diff --git a/assets/opencomputers/textures/items/terminal.png b/assets/opencomputers/textures/items/terminal.png
new file mode 100644
index 000000000..46c8e2ac3
Binary files /dev/null and b/assets/opencomputers/textures/items/terminal.png differ
diff --git a/assets/opencomputers/textures/items/terminal.png.mcmeta b/assets/opencomputers/textures/items/terminal.png.mcmeta
new file mode 100644
index 000000000..6274fbfe5
--- /dev/null
+++ b/assets/opencomputers/textures/items/terminal.png.mcmeta
@@ -0,0 +1,6 @@
+{
+  "animation": {
+    "frametime": 10,
+    "frames": [ 0, 1 ]
+  }
+}
\ No newline at end of file
diff --git a/li/cil/oc/client/GuiHandler.scala b/li/cil/oc/client/GuiHandler.scala
index b86978596..320b1091f 100644
--- a/li/cil/oc/client/GuiHandler.scala
+++ b/li/cil/oc/client/GuiHandler.scala
@@ -1,10 +1,11 @@
 package li.cil.oc.client
 
-import li.cil.oc.Items
 import li.cil.oc.common.inventory.ServerInventory
 import li.cil.oc.common.{GuiHandler => CommonGuiHandler, item, tileentity, GuiType}
+import li.cil.oc.{Settings, Items}
 import net.minecraft.entity.player.EntityPlayer
 import net.minecraft.world.World
+import scala.collection.convert.WrapAsScala._
 
 object GuiHandler extends CommonGuiHandler {
   override def getClientGuiElement(id: Int, player: EntityPlayer, world: World, x: Int, y: Int, z: Int) =
@@ -20,7 +21,7 @@ object GuiHandler extends CommonGuiHandler {
       case rack: tileentity.Rack if id == GuiType.Rack.id =>
         new gui.Rack(player.inventory, rack)
       case screen: tileentity.Screen if id == GuiType.Screen.id =>
-        new gui.Screen(screen)
+        new gui.Screen(screen.origin.buffer, screen.tier > 0, () => screen.origin.hasPower)
       case _ => Items.multi.subItem(player.getCurrentEquippedItem) match {
         case Some(server: item.Server) if id == GuiType.Server.id =>
           new gui.Server(player.inventory, new ServerInventory {
@@ -29,7 +30,27 @@ object GuiHandler extends CommonGuiHandler {
             override def isUseableByPlayer(player: EntityPlayer) = player == player
           })
         case Some(terminal: item.Terminal) if id == GuiType.Terminal.id =>
-          null // TODO
+          val stack = player.getCurrentEquippedItem
+          if (stack.hasTagCompound) {
+            val address = stack.getTagCompound.getString(Settings.namespace + "server")
+            if (address != null && !address.isEmpty) {
+              // Check if bound to server is loaded. TODO optimize this?
+              world.loadedTileEntityList.flatMap {
+                case rack: tileentity.Rack => rack.terminals
+                case _ => Iterable.empty
+              } find (_.rack.isPresent.exists {
+                case Some(value) => value == address
+                case _ => false
+              }) match {
+                case Some(term) =>
+                  // TODO check reachability
+                  new gui.Screen(term.buffer, true, () => true)
+                case _ => null
+              }
+            }
+            else null
+          }
+          else null
         case _ => null
       }
     }
diff --git a/li/cil/oc/client/PacketHandler.scala b/li/cil/oc/client/PacketHandler.scala
index 85262537b..948858fbc 100644
--- a/li/cil/oc/client/PacketHandler.scala
+++ b/li/cil/oc/client/PacketHandler.scala
@@ -167,44 +167,53 @@ class PacketHandler extends CommonPacketHandler {
       case _ => // Invalid packet.
     }
 
-  def onScreenColorChange(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(t) =>
-        t.buffer.foreground = p.readInt()
-        t.buffer.background = p.readInt()
-      case _ => // Invalid packet.
+  def onScreenColorChange(p: PacketParser) {
+    val buffer = p.readTileEntity[TileEntity]() match {
+      case Some(t: Buffer) => t.buffer
+      case Some(t: Rack) => t.terminals(p.readInt()).buffer
+      case _ => return // Invalid packet.
     }
+    buffer.foreground = p.readInt()
+    buffer.background = p.readInt()
+  }
 
-  def onScreenCopy(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(t) =>
-        val col = p.readInt()
-        val row = p.readInt()
-        val w = p.readInt()
-        val h = p.readInt()
-        val tx = p.readInt()
-        val ty = p.readInt()
-        t.buffer.copy(col, row, w, h, tx, ty)
-      case _ => // Invalid packet.
+  def onScreenCopy(p: PacketParser) {
+    val buffer = p.readTileEntity[TileEntity]() match {
+      case Some(t: Buffer) => t.buffer
+      case Some(t: Rack) => t.terminals(p.readInt()).buffer
+      case _ => return // Invalid packet.
     }
+    val col = p.readInt()
+    val row = p.readInt()
+    val w = p.readInt()
+    val h = p.readInt()
+    val tx = p.readInt()
+    val ty = p.readInt()
+    buffer.copy(col, row, w, h, tx, ty)
+  }
 
-  def onScreenDepthChange(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(t) => t.buffer.depth = PackedColor.Depth(p.readInt())
-      case _ => // Invalid packet.
+  def onScreenDepthChange(p: PacketParser) {
+    val buffer = p.readTileEntity[TileEntity]() match {
+      case Some(t: Buffer) => t.buffer
+      case Some(t: Rack) => t.terminals(p.readInt()).buffer
+      case _ => return // Invalid packet.
     }
+    buffer.depth = PackedColor.Depth(p.readInt())
+  }
 
-  def onScreenFill(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(t) =>
-        val col = p.readInt()
-        val row = p.readInt()
-        val w = p.readInt()
-        val h = p.readInt()
-        val c = p.readChar()
-        t.buffer.fill(col, row, w, h, c)
-      case _ => // Invalid packet.
+  def onScreenFill(p: PacketParser) {
+    val buffer = p.readTileEntity[TileEntity]() match {
+      case Some(t: Buffer) => t.buffer
+      case Some(t: Rack) => t.terminals(p.readInt()).buffer
+      case _ => return // Invalid packet.
     }
+    val col = p.readInt()
+    val row = p.readInt()
+    val w = p.readInt()
+    val h = p.readInt()
+    val c = p.readChar()
+    buffer.fill(col, row, w, h, c)
+  }
 
   def onScreenPowerChange(p: PacketParser) =
     p.readTileEntity[Screen]() match {
@@ -212,28 +221,37 @@ class PacketHandler extends CommonPacketHandler {
       case _ => // Invalid packet.
     }
 
-  def onScreenResolutionChange(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(t) =>
-        val w = p.readInt()
-        val h = p.readInt()
-        t.buffer.resolution = (w, h)
-      case _ => // Invalid packet.
+  def onScreenResolutionChange(p: PacketParser) {
+    val buffer = p.readTileEntity[TileEntity]() match {
+      case Some(t: Buffer) => t.buffer
+      case Some(t: Rack) => t.terminals(p.readInt()).buffer
+      case _ => return // Invalid packet.
     }
+    val w = p.readInt()
+    val h = p.readInt()
+    buffer.resolution = (w, h)
+  }
 
-  def onScreenSet(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(t) =>
-        val col = p.readInt()
-        val row = p.readInt()
-        val s = p.readUTF()
-        t.buffer.set(col, row, s)
-      case _ => // Invalid packet.
+  def onScreenSet(p: PacketParser) {
+    val buffer = p.readTileEntity[TileEntity]() match {
+      case Some(t: Buffer) => t.buffer
+      case Some(t: Rack) => t.terminals(p.readInt()).buffer
+      case _ => return // Invalid packet.
     }
+    val col = p.readInt()
+    val row = p.readInt()
+    val s = p.readUTF()
+    buffer.set(col, row, s)
+  }
 
   def onServerPresence(p: PacketParser) =
     p.readTileEntity[Rack]() match {
-      case Some(t) => for (i <- 0 until t.isPresent.length) t.isPresent(i) = p.readBoolean()
+      case Some(t) => for (i <- 0 until t.isPresent.length) {
+        if (p.readBoolean()) {
+          t.isPresent(i) = Some(p.readUTF())
+        }
+        else t.isPresent(i) = None
+      }
       case _ => // Invalid packet.
     }
 }
\ No newline at end of file
diff --git a/li/cil/oc/client/PacketSender.scala b/li/cil/oc/client/PacketSender.scala
index 1fd9aaea3..17817ad42 100644
--- a/li/cil/oc/client/PacketSender.scala
+++ b/li/cil/oc/client/PacketSender.scala
@@ -2,6 +2,7 @@ package li.cil.oc.client
 
 import li.cil.oc.common.PacketBuilder
 import li.cil.oc.common.PacketType
+import li.cil.oc.common.component
 import li.cil.oc.common.tileentity._
 import net.minecraftforge.common.ForgeDirection
 
@@ -15,61 +16,93 @@ object PacketSender {
     pb.sendToServer()
   }
 
-  def sendKeyDown(t: Buffer, char: Char, code: Int) =
-    if (t.hasKeyboard) {
-      val pb = new PacketBuilder(PacketType.KeyDown)
+  def sendKeyDown(b: component.Buffer, char: Char, code: Int) {
+    val pb = new PacketBuilder(PacketType.KeyDown)
 
-      pb.writeTileEntity(t)
-      pb.writeChar(char)
-      pb.writeInt(code)
-
-      pb.sendToServer()
+    b.owner match {
+      case t: Buffer if t.hasKeyboard =>
+        pb.writeTileEntity(t)
+      case t: component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+      case _ => return
     }
+    pb.writeChar(char)
+    pb.writeInt(code)
 
-  def sendKeyUp(t: Buffer, char: Char, code: Int) =
-    if (t.hasKeyboard) {
-      val pb = new PacketBuilder(PacketType.KeyUp)
+    pb.sendToServer()
+  }
 
-      pb.writeTileEntity(t)
-      pb.writeChar(char)
-      pb.writeInt(code)
+  def sendKeyUp(b: component.Buffer, char: Char, code: Int) {
+    val pb = new PacketBuilder(PacketType.KeyUp)
 
-      pb.sendToServer()
+    b.owner match {
+      case t: Buffer if t.hasKeyboard =>
+        pb.writeTileEntity(t)
+      case t: component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+      case _ => return
     }
+    pb.writeChar(char)
+    pb.writeInt(code)
 
-  def sendClipboard(t: Buffer, value: String) =
-    if (value != null && !value.isEmpty && t.hasKeyboard) {
+    pb.sendToServer()
+  }
+
+  def sendClipboard(b: component.Buffer, value: String) {
+    if (value != null && !value.isEmpty) {
       val pb = new PacketBuilder(PacketType.Clipboard)
 
-      pb.writeTileEntity(t)
+      b.owner match {
+        case t: Buffer if t.hasKeyboard =>
+          pb.writeTileEntity(t)
+        case t: component.Terminal =>
+          pb.writeTileEntity(t.rack)
+          pb.writeInt(t.number)
+        case _ => return
+      }
       pb.writeUTF(value.substring(0, math.min(value.length, 1024)))
 
       pb.sendToServer()
     }
+  }
 
-  def sendMouseClick(t: Buffer, x: Int, y: Int, drag: Boolean) =
-    if (t.tier > 0) {
-      val pb = new PacketBuilder(PacketType.MouseClickOrDrag)
+  def sendMouseClick(b: component.Buffer, x: Int, y: Int, drag: Boolean) {
+    val pb = new PacketBuilder(PacketType.MouseClickOrDrag)
 
-      pb.writeTileEntity(t)
-      pb.writeInt(x)
-      pb.writeInt(y)
-      pb.writeBoolean(drag)
-
-      pb.sendToServer()
+    b.owner match {
+      case t: Buffer if t.tier > 0 =>
+        pb.writeTileEntity(t)
+      case t: component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+      case _ => return
     }
+    pb.writeInt(x)
+    pb.writeInt(y)
+    pb.writeBoolean(drag)
 
-  def sendMouseScroll(t: Buffer, x: Int, y: Int, scroll: Int) =
-    if (t.tier > 0) {
-      val pb = new PacketBuilder(PacketType.MouseScroll)
+    pb.sendToServer()
+  }
 
-      pb.writeTileEntity(t)
-      pb.writeInt(x)
-      pb.writeInt(y)
-      pb.writeByte(scroll)
+  def sendMouseScroll(b: component.Buffer, x: Int, y: Int, scroll: Int) {
+    val pb = new PacketBuilder(PacketType.MouseScroll)
 
-      pb.sendToServer()
+    b.owner match {
+      case t: Buffer if t.tier > 0 =>
+        pb.writeTileEntity(t)
+      case t: component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+      case _ => return
     }
+    pb.writeInt(x)
+    pb.writeInt(y)
+    pb.writeByte(scroll)
+
+    pb.sendToServer()
+  }
 
   def sendServerPower(t: Rack, number: Int, power: Boolean) {
     val pb = new PacketBuilder(PacketType.ComputerPower)
diff --git a/li/cil/oc/client/gui/Buffer.scala b/li/cil/oc/client/gui/Buffer.scala
index f751d6c14..ee141566a 100644
--- a/li/cil/oc/client/gui/Buffer.scala
+++ b/li/cil/oc/client/gui/Buffer.scala
@@ -43,7 +43,7 @@ trait Buffer extends GuiScreen {
     super.onGuiClosed()
     buffer.owner.currentGui = None
     for ((code, char) <- pressedKeys) {
-      PacketSender.sendKeyUp(buffer.owner, char, code)
+      PacketSender.sendKeyUp(buffer, char, code)
     }
     Keyboard.enableRepeatEvents(false)
   }
@@ -75,17 +75,17 @@ trait Buffer extends GuiScreen {
       if (Keyboard.getEventKeyState) {
         val char = Keyboard.getEventCharacter
         if (!pressedKeys.contains(code) || !ignoreRepeat(char, code)) {
-          PacketSender.sendKeyDown(buffer.owner, char, code)
+          PacketSender.sendKeyDown(buffer, char, code)
           pressedKeys += code -> char
         }
       }
       else pressedKeys.remove(code) match {
-        case Some(char) => PacketSender.sendKeyUp(buffer.owner, char, code)
+        case Some(char) => PacketSender.sendKeyUp(buffer, char, code)
         case _ => // Wasn't pressed while viewing the screen.
       }
 
       if (isPasteShortcutPressed && Keyboard.getEventKeyState) {
-        PacketSender.sendClipboard(buffer.owner, GuiScreen.getClipboardString)
+        PacketSender.sendClipboard(buffer, GuiScreen.getClipboardString)
       }
     }
   }
@@ -93,7 +93,7 @@ trait Buffer extends GuiScreen {
   override protected def mouseClicked(x: Int, y: Int, button: Int) {
     super.mouseClicked(x, y, button)
     if (button == 2) {
-      PacketSender.sendClipboard(buffer.owner, GuiScreen.getClipboardString)
+      PacketSender.sendClipboard(buffer, GuiScreen.getClipboardString)
     }
   }
 
diff --git a/li/cil/oc/client/gui/Screen.scala b/li/cil/oc/client/gui/Screen.scala
index f8cae6695..25c939742 100644
--- a/li/cil/oc/client/gui/Screen.scala
+++ b/li/cil/oc/client/gui/Screen.scala
@@ -3,14 +3,12 @@ package li.cil.oc.client.gui
 import li.cil.oc.client.PacketSender
 import li.cil.oc.client.renderer.MonospaceFontRenderer
 import li.cil.oc.client.renderer.gui.BufferRenderer
-import li.cil.oc.common.tileentity
+import li.cil.oc.common
 import li.cil.oc.util.RenderState
 import org.lwjgl.input.Mouse
 import org.lwjgl.opengl.GL11
 
-class Screen(val screen: tileentity.Screen) extends Buffer {
-  protected def buffer = screen.origin.buffer
-
+class Screen(val buffer: common.component.Buffer, val hasMouse: Boolean, val hasPower: () => Boolean) extends Buffer {
   private val bufferMargin = BufferRenderer.margin + BufferRenderer.innerMargin
 
   private var x, y = 0
@@ -27,14 +25,14 @@ class Screen(val screen: tileentity.Screen) extends Buffer {
       val (bw, bh) = buffer.resolution
       if (bx > 0 && by > 0 && bx <= bw && by <= bh) {
         val scroll = math.signum(Mouse.getEventDWheel)
-        PacketSender.sendMouseScroll(buffer.owner, bx, by, scroll)
+        PacketSender.sendMouseScroll(buffer, bx, by, scroll)
       }
     }
   }
 
   override protected def mouseClicked(mouseX: Int, mouseY: Int, button: Int) {
     super.mouseClicked(mouseX, mouseY, button)
-    if (screen.tier > 0) {
+    if (hasMouse) {
       if (button == 0) {
         clickOrDrag(mouseX, mouseY)
       }
@@ -43,7 +41,7 @@ class Screen(val screen: tileentity.Screen) extends Buffer {
 
   protected override def mouseClickMove(mouseX: Int, mouseY: Int, button: Int, timeSinceLast: Long) {
     super.mouseClickMove(mouseX, mouseY, button, timeSinceLast)
-    if (screen.tier > 0 && timeSinceLast > 10) {
+    if (hasMouse && timeSinceLast > 10) {
       if (button == 0) {
         clickOrDrag(mouseX, mouseY)
       }
@@ -64,7 +62,7 @@ class Screen(val screen: tileentity.Screen) extends Buffer {
     val (bw, bh) = buffer.resolution
     if (bx > 0 && by > 0 && bx <= bw && by <= bh) {
       if (bx != mx || by != my) {
-        PacketSender.sendMouseClick(buffer.owner, bx, by, mx > 0 && my > 0)
+        PacketSender.sendMouseClick(buffer, bx, by, mx > 0 && my > 0)
         mx = bx
         my = by
       }
@@ -79,7 +77,7 @@ class Screen(val screen: tileentity.Screen) extends Buffer {
   def drawBuffer() {
     GL11.glTranslatef(x, y, 0)
     BufferRenderer.drawBackground()
-    if (screen.origin.hasPower) {
+    if (hasPower()) {
       GL11.glTranslatef(bufferMargin, bufferMargin, 0)
       RenderState.makeItBlend()
       BufferRenderer.drawText()
diff --git a/li/cil/oc/client/renderer/block/BlockRenderer.scala b/li/cil/oc/client/renderer/block/BlockRenderer.scala
index 141fdf6f0..1b8a30b36 100644
--- a/li/cil/oc/client/renderer/block/BlockRenderer.scala
+++ b/li/cil/oc/client/renderer/block/BlockRenderer.scala
@@ -103,7 +103,7 @@ object BlockRenderer extends ISimpleBlockRenderingHandler {
         val front = rack.facing
         def renderSide(side: ForgeDirection, lx: Double, lz: Double, hx: Double, hz: Double) {
           if (side == front) {
-            for (i <- 0 until 4 if rack.isPresent(i)) {
+            for (i <- 0 until 4 if rack.isPresent(i).isDefined) {
               side match {
                 case ForgeDirection.WEST =>
                   renderer.setRenderBounds(lx, v2 - (i + 1) * fs, lz + u1, u2, v2 - i * fs, hz - u1)
diff --git a/li/cil/oc/common/component/Buffer.scala b/li/cil/oc/common/component/Buffer.scala
index 98e7c030f..4ec2ec5e7 100644
--- a/li/cil/oc/common/component/Buffer.scala
+++ b/li/cil/oc/common/component/Buffer.scala
@@ -8,7 +8,7 @@ import li.cil.oc.{api, Settings}
 import net.minecraft.nbt.NBTTagCompound
 import scala.collection.convert.WrapAsScala._
 
-class Buffer(val owner: tileentity.Buffer) extends api.network.Environment with Persistable {
+class Buffer(val owner: Buffer.Owner) extends api.network.Environment with Persistable {
   val node = api.Network.newNode(this, Visibility.Network).
     withComponent("screen").
     withConnector().
@@ -140,3 +140,30 @@ class Buffer(val owner: tileentity.Buffer) extends api.network.Environment with
     nbt.setNewCompoundTag("buffer", buffer.save)
   }
 }
+
+object Buffer {
+  import li.cil.oc.client.gui
+
+  trait Owner {
+    protected var _currentGui: Option[gui.Buffer] = None
+
+    def currentGui = _currentGui
+
+    def currentGui_=(value: Option[gui.Buffer]) = _currentGui = value
+
+    def tier: Int
+
+    def onScreenColorChange(foreground: Int, background: Int)
+
+    def onScreenCopy(col: Int, row: Int, w: Int, h: Int, tx: Int, ty: Int)
+
+    def onScreenDepthChange(depth: PackedColor.Depth.Value)
+
+    def onScreenFill(col: Int, row: Int, w: Int, h: Int, c: Char)
+
+    def onScreenResolutionChange(w: Int, h: Int)
+
+    def onScreenSet(col: Int, row: Int, s: String)
+  }
+
+}
\ No newline at end of file
diff --git a/li/cil/oc/common/component/Terminal.scala b/li/cil/oc/common/component/Terminal.scala
new file mode 100644
index 000000000..bcd5d699e
--- /dev/null
+++ b/li/cil/oc/common/component/Terminal.scala
@@ -0,0 +1,94 @@
+package li.cil.oc.common.component
+
+import li.cil.oc.api.network.{Node, Visibility}
+import li.cil.oc.common.tileentity
+import li.cil.oc.server.component
+import li.cil.oc.server.{PacketSender => ServerPacketSender}
+import li.cil.oc.util.ExtendedNBT._
+import li.cil.oc.util.PackedColor.Depth
+import li.cil.oc.{Settings, common}
+import net.minecraft.entity.player.EntityPlayer
+import net.minecraft.nbt.NBTTagCompound
+
+class Terminal(val rack: tileentity.Rack, val number: Int) extends Buffer.Owner {
+  val buffer = new common.component.Buffer(this)
+  val keyboard = if (buffer.node != null) {
+    buffer.node.setVisibility(Visibility.Neighbors)
+    new component.Keyboard {
+      override def isUseableByPlayer(p: EntityPlayer) = true // TODO if player has bound terminal
+    }
+  }
+  else null
+
+  def isServer = rack.isServer
+
+  def connect(node: Node) {
+    node.connect(buffer.node)
+    node.connect(keyboard.node)
+    buffer.node.connect(keyboard.node)
+  }
+
+  def tier = 1
+
+  // ----------------------------------------------------------------------- //
+
+  def load(nbt: NBTTagCompound) {
+    buffer.load(nbt.getCompoundTag(Settings.namespace + "buffer"))
+    keyboard.load(nbt.getCompoundTag(Settings.namespace + "keyboard"))
+  }
+
+  def save(nbt: NBTTagCompound) {
+    nbt.setNewCompoundTag(Settings.namespace + "buffer", buffer.save)
+    nbt.setNewCompoundTag(Settings.namespace + "keyboard", keyboard.save)
+  }
+
+  // ----------------------------------------------------------------------- //
+
+  def onScreenColorChange(foreground: Int, background: Int) {
+    if (isServer) {
+      rack.markAsChanged()
+      ServerPacketSender.sendScreenColorChange(buffer, foreground, background)
+    }
+    else currentGui.foreach(_.recompileDisplayLists())
+  }
+
+  def onScreenCopy(col: Int, row: Int, w: Int, h: Int, tx: Int, ty: Int) {
+    if (isServer) {
+      rack.markAsChanged()
+      ServerPacketSender.sendScreenCopy(buffer, col, row, w, h, tx, ty)
+    }
+    else currentGui.foreach(_.recompileDisplayLists())
+  }
+
+  def onScreenDepthChange(depth: Depth.Value) {
+    if (isServer) {
+      rack.markAsChanged()
+      ServerPacketSender.sendScreenDepthChange(buffer, depth)
+    }
+    else currentGui.foreach(_.recompileDisplayLists())
+  }
+
+  def onScreenFill(col: Int, row: Int, w: Int, h: Int, c: Char) {
+    if (isServer) {
+      rack.markAsChanged()
+      ServerPacketSender.sendScreenFill(buffer, col, row, w, h, c)
+    }
+    else currentGui.foreach(_.recompileDisplayLists())
+  }
+
+  def onScreenResolutionChange(w: Int, h: Int) {
+    if (isServer) {
+      rack.markAsChanged()
+      ServerPacketSender.sendScreenResolutionChange(buffer, w, h)
+    }
+    else currentGui.foreach(_.recompileDisplayLists())
+  }
+
+  def onScreenSet(col: Int, row: Int, s: String) {
+    if (isServer) {
+      rack.markAsChanged()
+      ServerPacketSender.sendScreenSet(buffer, col, row, s)
+    }
+    else currentGui.foreach(_.recompileDisplayLists())
+  }
+}
diff --git a/li/cil/oc/common/container/Server.scala b/li/cil/oc/common/container/Server.scala
index 3ed7fb800..ccccce67e 100644
--- a/li/cil/oc/common/container/Server.scala
+++ b/li/cil/oc/common/container/Server.scala
@@ -6,7 +6,7 @@ import net.minecraft.entity.player.{EntityPlayer, InventoryPlayer}
 
 class Server(playerInventory: InventoryPlayer, serverInventory: ServerInventory) extends Player(playerInventory, serverInventory) {
   for (i <- 0 to 1) {
-    addSlotToContainer(76, 7 + i * slotSize, api.driver.Slot.Card, 1)
+    addSlotToContainer(76, 7 + i * slotSize, api.driver.Slot.Card, 2 - i)
   }
 
   for (i <- 0 to 3) {
diff --git a/li/cil/oc/common/inventory/ServerInventory.scala b/li/cil/oc/common/inventory/ServerInventory.scala
index 22e6b8abf..3062b44fe 100644
--- a/li/cil/oc/common/inventory/ServerInventory.scala
+++ b/li/cil/oc/common/inventory/ServerInventory.scala
@@ -18,7 +18,8 @@ trait ServerInventory extends ItemStackInventory {
   override def isItemValidForSlot(slot: Int, stack: ItemStack) =
     (slot, Registry.itemDriverFor(stack)) match {
       case (_, None) => false // Invalid item.
-      case (0 | 1, Some(driver)) => driver.slot(stack) == Slot.Card && driver.tier(stack) <= 1
+      case (0, Some(driver)) => driver.slot(stack) == Slot.Card && driver.tier(stack) <= 2
+      case (1, Some(driver)) => driver.slot(stack) == Slot.Card && driver.tier(stack) <= 1
       case (2 | 3 | 4 | 5, Some(driver)) => driver.slot(stack) == Slot.Processor && driver.tier(stack) <= 2
       case (6 | 7 | 8 | 9, Some(driver)) => driver.slot(stack) == Slot.Memory && driver.tier(stack) <= 2
       case (10 | 11 | 12 | 13, Some(driver)) => driver.slot(stack) == Slot.HardDiskDrive && driver.tier(stack) <= 2
diff --git a/li/cil/oc/common/item/Terminal.scala b/li/cil/oc/common/item/Terminal.scala
index cdcde0908..841b382b3 100644
--- a/li/cil/oc/common/item/Terminal.scala
+++ b/li/cil/oc/common/item/Terminal.scala
@@ -1,5 +1,70 @@
 package li.cil.oc.common.item
 
+import cpw.mods.fml.relauncher.{SideOnly, Side}
+import java.util
+import li.cil.oc.common.{GuiType, tileentity}
+import li.cil.oc.util.Tooltip
+import li.cil.oc.{OpenComputers, Settings}
+import net.minecraft.client.renderer.texture.IconRegister
+import net.minecraft.entity.player.EntityPlayer
+import net.minecraft.item.ItemStack
+import net.minecraft.nbt.NBTTagCompound
+import net.minecraft.world.World
+
 class Terminal(val parent: Delegator) extends Delegate {
   val unlocalizedName = "Terminal"
+
+  @SideOnly(Side.CLIENT)
+  override def tooltipLines(stack: ItemStack, player: EntityPlayer, tooltip: util.List[String], advanced: Boolean) {
+    tooltip.addAll(Tooltip.get(unlocalizedName))
+    if (stack.hasTagCompound && stack.getTagCompound.hasKey(Settings.namespace + "server")) {
+      val server = stack.getTagCompound.getString(Settings.namespace + "server")
+      tooltip.add("§8" + server.substring(0, 13) + "...§7")
+    }
+    super.tooltipLines(stack, player, tooltip, advanced)
+  }
+
+  override def registerIcons(iconRegister: IconRegister) = {
+    super.registerIcons(iconRegister)
+
+    icon = iconRegister.registerIcon(Settings.resourceDomain + ":terminal")
+  }
+
+  override def onItemUse(stack: ItemStack, player: EntityPlayer, world: World, x: Int, y: Int, z: Int, side: Int, hitX: Float, hitY: Float, hitZ: Float) = {
+    world.getBlockTileEntity(x, y, z) match {
+      case rack: tileentity.Rack if side == rack.facing.ordinal() =>
+        val l = 2 / 16.0
+        val h = 14 / 16.0
+        val s = (((1 - hitY) - l) / (h - l) * 4).toInt
+        if (s >= 0 && s <= 3 && rack.items(s).isDefined) {
+          if (!world.isRemote) {
+            rack.servers(s) match {
+              case Some(server) =>
+                if (!stack.hasTagCompound) {
+                  stack.setTagCompound(new NBTTagCompound("tag"))
+                }
+                stack.getTagCompound.setString(Settings.namespace + "server", server.machine.address)
+                player.inventory.onInventoryChanged()
+              case _ => // Huh?
+            }
+          }
+          true
+        }
+        else false
+      case _ => super.onItemUseFirst(stack, player, world, x, y, z, side, hitX, hitY, hitZ)
+    }
+  }
+
+  override def onItemRightClick(stack: ItemStack, world: World, player: EntityPlayer) = {
+    if (!player.isSneaking && stack.hasTagCompound) {
+      val address = stack.getTagCompound.getString(Settings.namespace + "server")
+      if (address != null && !address.isEmpty) {
+        if (world.isRemote) {
+          player.openGui(OpenComputers, GuiType.Terminal.id, world, 0, 0, 0)
+        }
+        player.swingItem()
+      }
+    }
+    super.onItemRightClick(stack, world, player)
+  }
 }
diff --git a/li/cil/oc/common/tileentity/Buffer.scala b/li/cil/oc/common/tileentity/Buffer.scala
index e6de82e8f..98196e31e 100644
--- a/li/cil/oc/common/tileentity/Buffer.scala
+++ b/li/cil/oc/common/tileentity/Buffer.scala
@@ -2,29 +2,22 @@ package li.cil.oc.common.tileentity
 
 import cpw.mods.fml.relauncher.{Side, SideOnly}
 import li.cil.oc.api.network.Node
-import li.cil.oc.client.gui
 import li.cil.oc.common.component
 import li.cil.oc.server.{PacketSender => ServerPacketSender}
 import li.cil.oc.util.PackedColor
 import net.minecraft.nbt.NBTTagCompound
 
-trait Buffer extends Environment {
+trait Buffer extends Environment with component.Buffer.Owner {
   protected val _buffer = new component.Buffer(this)
 
   protected var _bufferIsDirty = false
 
-  protected var _currentGui = None: Option[gui.Buffer]
-
   lazy val buffer = _buffer
 
   def bufferIsDirty = _bufferIsDirty
 
   def bufferIsDirty_=(value: Boolean) = _bufferIsDirty = value
 
-  def currentGui = _currentGui
-
-  def currentGui_=(value: Option[gui.Buffer]) = _currentGui = value
-
   def node: Node = buffer.node
 
   def tier: Int
@@ -58,47 +51,47 @@ trait Buffer extends Environment {
 
   def onScreenColorChange(foreground: Int, background: Int) {
     if (isServer) {
-      world.markTileEntityChunkModified(x, y, z, this.asInstanceOf[net.minecraft.tileentity.TileEntity])
-      ServerPacketSender.sendScreenColorChange(this, foreground, background)
+      world.markTileEntityChunkModified(x, y, z, this)
+      ServerPacketSender.sendScreenColorChange(buffer, foreground, background)
     }
   }
 
   def onScreenCopy(col: Int, row: Int, w: Int, h: Int, tx: Int, ty: Int) {
     if (isServer) {
-      world.markTileEntityChunkModified(x, y, z, this.asInstanceOf[net.minecraft.tileentity.TileEntity])
-      ServerPacketSender.sendScreenCopy(this, col, row, w, h, tx, ty)
+      world.markTileEntityChunkModified(x, y, z, this)
+      ServerPacketSender.sendScreenCopy(buffer, col, row, w, h, tx, ty)
     }
     else markForRenderUpdate()
   }
 
   def onScreenDepthChange(depth: PackedColor.Depth.Value) {
     if (isServer) {
-      world.markTileEntityChunkModified(x, y, z, this.asInstanceOf[net.minecraft.tileentity.TileEntity])
-      ServerPacketSender.sendScreenDepthChange(this, depth)
+      world.markTileEntityChunkModified(x, y, z, this)
+      ServerPacketSender.sendScreenDepthChange(buffer, depth)
     }
     else markForRenderUpdate()
   }
 
   def onScreenFill(col: Int, row: Int, w: Int, h: Int, c: Char) {
     if (isServer) {
-      world.markTileEntityChunkModified(x, y, z, this.asInstanceOf[net.minecraft.tileentity.TileEntity])
-      ServerPacketSender.sendScreenFill(this, col, row, w, h, c)
+      world.markTileEntityChunkModified(x, y, z, this)
+      ServerPacketSender.sendScreenFill(buffer, col, row, w, h, c)
     }
     else markForRenderUpdate()
   }
 
   def onScreenResolutionChange(w: Int, h: Int) {
     if (isServer) {
-      world.markTileEntityChunkModified(x, y, z, this.asInstanceOf[net.minecraft.tileentity.TileEntity])
-      ServerPacketSender.sendScreenResolutionChange(this, w, h)
+      world.markTileEntityChunkModified(x, y, z, this)
+      ServerPacketSender.sendScreenResolutionChange(buffer, w, h)
     }
     else markForRenderUpdate()
   }
 
   def onScreenSet(col: Int, row: Int, s: String) {
     if (isServer) {
-      world.markTileEntityChunkModified(x, y, z, this.asInstanceOf[net.minecraft.tileentity.TileEntity])
-      ServerPacketSender.sendScreenSet(this, col, row, s)
+      world.markTileEntityChunkModified(x, y, z, this)
+      ServerPacketSender.sendScreenSet(buffer, col, row, s)
     }
     else markForRenderUpdate()
   }
diff --git a/li/cil/oc/common/tileentity/Keyboard.scala b/li/cil/oc/common/tileentity/Keyboard.scala
index 3e9af91d8..c5898b620 100644
--- a/li/cil/oc/common/tileentity/Keyboard.scala
+++ b/li/cil/oc/common/tileentity/Keyboard.scala
@@ -12,7 +12,11 @@ import net.minecraftforge.common.ForgeDirection
 class Keyboard(isRemote: Boolean) extends Environment with SidedEnvironment with Analyzable with Rotatable with PassiveNode {
   def this() = this(false)
 
-  val keyboard = if (isRemote) null else new component.Keyboard(this)
+  val keyboard = if (isRemote) null else new component.Keyboard {
+    def isUseableByPlayer(p: EntityPlayer) =
+      world.getBlockTileEntity(x, y, z) == Keyboard.this &&
+        p.getDistanceSq(x + 0.5, y + 0.5, z + 0.5) <= 64
+  }
 
   def node = if (isClient) null else keyboard.node
 
diff --git a/li/cil/oc/common/tileentity/Rack.scala b/li/cil/oc/common/tileentity/Rack.scala
index e4b1a572a..a97bc19ba 100644
--- a/li/cil/oc/common/tileentity/Rack.scala
+++ b/li/cil/oc/common/tileentity/Rack.scala
@@ -3,12 +3,13 @@ package li.cil.oc.common.tileentity
 import cpw.mods.fml.common.Optional
 import cpw.mods.fml.relauncher.{Side, SideOnly}
 import li.cil.oc.api.network.{Visibility, Node, Analyzable}
+import li.cil.oc.common
 import li.cil.oc.server.{PacketSender => ServerPacketSender, driver, component}
 import li.cil.oc.util.ExtendedNBT._
 import li.cil.oc.{api, Items, Settings}
 import net.minecraft.entity.player.EntityPlayer
 import net.minecraft.item.ItemStack
-import net.minecraft.nbt.NBTTagCompound
+import net.minecraft.nbt.{NBTTagString, NBTTagCompound}
 import net.minecraftforge.common.ForgeDirection
 import stargatetech2.api.bus.IBusDevice
 
@@ -19,13 +20,15 @@ class Rack extends Hub with PowerBalancer with Inventory with Rotatable with Bun
 
   val sides = Array.fill(servers.length)(ForgeDirection.UNKNOWN)
 
+  val terminals = (0 until servers.length).map(new common.component.Terminal(this, _)).toArray
+
   // For client side, where we don't create the component.
   private val _isRunning = new Array[Boolean](getSizeInventory)
 
   private var hasChanged = false
 
   // For client side rendering.
-  var isPresent = new Array[Boolean](getSizeInventory)
+  var isPresent = Array.fill[Option[String]](getSizeInventory)(None)
 
   // ----------------------------------------------------------------------- //
 
@@ -147,8 +150,6 @@ class Rack extends Hub with PowerBalancer with Inventory with Rotatable with Bun
 
   override def readFromNBT(nbt: NBTTagCompound) {
     super.readFromNBT(nbt)
-    val sidesNbt = nbt.getByteArray(Settings.namespace + "sides").byteArray.map(ForgeDirection.getOrientation(_))
-    Array.copy(sidesNbt, 0, sides, 0, math.min(sidesNbt.length, sides.length))
     for (slot <- 0 until getSizeInventory) {
       if (getStackInSlot(slot) != null) {
         val server = new component.Server(this, slot)
@@ -161,10 +162,15 @@ class Rack extends Hub with PowerBalancer with Inventory with Rotatable with Bun
         case _ =>
       }
     }
+    val sidesNbt = nbt.getByteArray(Settings.namespace + "sides").byteArray.map(ForgeDirection.getOrientation(_))
+    Array.copy(sidesNbt, 0, sides, 0, math.min(sidesNbt.length, sides.length))
+    val terminalsNbt = nbt.getTagList(Settings.namespace + "terminals").iterator[NBTTagCompound].toArray
+    for (i <- 0 until math.min(terminals.length, terminalsNbt.length)) {
+      terminals(i).load(terminalsNbt(i))
+    }
   }
 
   override def writeToNBT(nbt: NBTTagCompound) {
-    nbt.setByteArray(Settings.namespace + "sides", sides.map(_.ordinal.toByte))
     nbt.setNewTagList(Settings.namespace + "servers", servers map {
       case Some(server) =>
         val serverNbt = new NBTTagCompound()
@@ -173,6 +179,12 @@ class Rack extends Hub with PowerBalancer with Inventory with Rotatable with Bun
       case _ => new NBTTagCompound()
     })
     super.writeToNBT(nbt)
+    nbt.setByteArray(Settings.namespace + "sides", sides.map(_.ordinal.toByte))
+    nbt.setNewTagList(Settings.namespace + "terminals", terminals.map(t => {
+      val terminalNbt = new NBTTagCompound()
+      t.save(terminalNbt)
+      terminalNbt
+    }))
   }
 
   @SideOnly(Side.CLIENT)
@@ -180,17 +192,26 @@ class Rack extends Hub with PowerBalancer with Inventory with Rotatable with Bun
     super.readFromNBTForClient(nbt)
     val isRunningNbt = nbt.getByteArray("isRunning").byteArray.map(_ == 1)
     Array.copy(isRunningNbt, 0, _isRunning, 0, math.min(isRunningNbt.length, _isRunning.length))
-    val isPresentNbt = nbt.getByteArray("isPresent").byteArray.map(_ == 1)
+    val isPresentNbt = nbt.getTagList("isPresent").iterator[NBTTagString].map(value => if (value.data == "") None else Some(value.data)).toArray
     Array.copy(isPresentNbt, 0, isPresent, 0, math.min(isPresentNbt.length, isPresent.length))
     val sidesNbt = nbt.getByteArray("sides").byteArray.map(ForgeDirection.getOrientation(_))
     Array.copy(sidesNbt, 0, sides, 0, math.min(sidesNbt.length, sides.length))
+    val terminalsNbt = nbt.getTagList("terminals").iterator[NBTTagCompound].toArray
+    for (i <- 0 until math.min(terminals.length, terminalsNbt.length)) {
+      terminals(i).buffer.buffer.load(terminalsNbt(i))
+    }
   }
 
   override def writeToNBTForClient(nbt: NBTTagCompound) {
     super.writeToNBTForClient(nbt)
     nbt.setByteArray("isRunning", _isRunning.map(value => (if (value) 1 else 0).toByte))
-    nbt.setByteArray("isPresent", servers.map(value => (if (value.isDefined) 1 else 0).toByte))
+    nbt.setNewTagList("isPresent", servers.map(value => new NBTTagString(null, value.fold("")(_.machine.address))))
     nbt.setByteArray("sides", sides.map(_.ordinal.toByte))
+    nbt.setNewTagList("terminals", terminals.map(t => {
+      val terminalNbt = new NBTTagCompound()
+      t.buffer.buffer.save(terminalNbt)
+      terminalNbt
+    }))
   }
 
   // ----------------------------------------------------------------------- //
@@ -202,6 +223,7 @@ class Rack extends Hub with PowerBalancer with Inventory with Rotatable with Bun
         servers(number) match {
           case Some(server) if toGlobal(serverSide) == plug.side || serverSide == ForgeDirection.UNKNOWN =>
             plug.node.connect(server.machine.node)
+            terminals(number).connect(server.machine.node)
           case _ =>
         }
       }
@@ -218,6 +240,7 @@ class Rack extends Hub with PowerBalancer with Inventory with Rotatable with Bun
       val server = new component.Server(this, slot)
       servers(slot) = Some(server)
       reconnectServer(slot, server)
+      terminals(slot).connect(server.machine.node)
     }
   }
 
diff --git a/li/cil/oc/common/tileentity/Robot.scala b/li/cil/oc/common/tileentity/Robot.scala
index 6c3a26193..90a4da3ef 100644
--- a/li/cil/oc/common/tileentity/Robot.scala
+++ b/li/cil/oc/common/tileentity/Robot.scala
@@ -61,7 +61,7 @@ class Robot(isRemote: Boolean) extends Computer(isRemote) with ISidedInventory w
     val gpu = new GraphicsCard.Tier1 {
       override val maxResolution = (48, 14)
     }
-    val keyboard = new component.Keyboard(this) {
+    val keyboard = new component.Keyboard {
       override def isUseableByPlayer(p: EntityPlayer) =
         world.getBlockTileEntity(x, y, z) == proxy &&
           p.getDistanceSq(x + 0.5, y + 0.5, z + 0.5) <= 64
@@ -306,11 +306,9 @@ class Robot(isRemote: Boolean) extends Computer(isRemote) with ISidedInventory w
   // ----------------------------------------------------------------------- //
 
   override def readFromNBT(nbt: NBTTagCompound) {
-    if (isServer) {
-      buffer.load(nbt.getCompoundTag(Settings.namespace + "buffer"))
-      gpu.load(nbt.getCompoundTag(Settings.namespace + "gpu"))
-      keyboard.load(nbt.getCompoundTag(Settings.namespace + "keyboard"))
-    }
+    buffer.load(nbt.getCompoundTag(Settings.namespace + "buffer"))
+    gpu.load(nbt.getCompoundTag(Settings.namespace + "gpu"))
+    keyboard.load(nbt.getCompoundTag(Settings.namespace + "keyboard"))
     if (nbt.hasKey(Settings.namespace + "owner")) {
       owner = nbt.getString(Settings.namespace + "owner")
     }
diff --git a/li/cil/oc/common/tileentity/Screen.scala b/li/cil/oc/common/tileentity/Screen.scala
index 9da64ec67..1474159ff 100644
--- a/li/cil/oc/common/tileentity/Screen.scala
+++ b/li/cil/oc/common/tileentity/Screen.scala
@@ -154,7 +154,7 @@ class Screen(var tier: Int) extends Buffer with SidedEnvironment with Rotatable
 
     // Convert to absolute coordinates and send the packet to the server.
     if (world.isRemote) {
-      ClientPacketSender.sendMouseClick(this, (brx * bw).toInt + 1, (bry * bh).toInt + 1, drag = false)
+      ClientPacketSender.sendMouseClick(this.buffer, (brx * bw).toInt + 1, (bry * bh).toInt + 1, drag = false)
     }
     true
   }
diff --git a/li/cil/oc/server/PacketHandler.scala b/li/cil/oc/server/PacketHandler.scala
index 776ea3088..f5f436a80 100644
--- a/li/cil/oc/server/PacketHandler.scala
+++ b/li/cil/oc/server/PacketHandler.scala
@@ -56,59 +56,68 @@ class PacketHandler extends CommonPacketHandler {
   }
 
   def onKeyDown(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(s: Screen) =>
+    p.readTileEntity[TileEntity]() match {
+      case Some(t: Screen) =>
         val char = Char.box(p.readChar())
         val code = Int.box(p.readInt())
-        s.screens.foreach(_.node.sendToNeighbors("keyboard.keyDown", p.player, char, code))
-      case Some(e) => e.buffer.node.sendToNeighbors("keyboard.keyDown", p.player, Char.box(p.readChar()), Int.box(p.readInt()))
+        t.screens.foreach(_.node.sendToNeighbors("keyboard.keyDown", p.player, char, code))
+      case Some(t: Buffer) => t.buffer.node.sendToNeighbors("keyboard.keyDown", p.player, Char.box(p.readChar()), Int.box(p.readInt()))
+      case Some(t: Rack) => t.terminals(p.readInt()).buffer.node.sendToNeighbors("keyboard.keyDown", p.player, Char.box(p.readChar()), Int.box(p.readInt()))
       case _ => // Invalid packet.
     }
 
   def onKeyUp(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(s: Screen) =>
+    p.readTileEntity[TileEntity]() match {
+      case Some(t: Screen) =>
         val char = Char.box(p.readChar())
         val code = Int.box(p.readInt())
-        s.screens.foreach(_.node.sendToNeighbors("keyboard.keyUp", p.player, char, code))
-      case Some(e) => e.buffer.node.sendToNeighbors("keyboard.keyUp", p.player, Char.box(p.readChar()), Int.box(p.readInt()))
+        t.screens.foreach(_.node.sendToNeighbors("keyboard.keyUp", p.player, char, code))
+      case Some(t: Buffer) => t.buffer.node.sendToNeighbors("keyboard.keyUp", p.player, Char.box(p.readChar()), Int.box(p.readInt()))
+      case Some(t: Rack) => t.terminals(p.readInt()).buffer.node.sendToNeighbors("keyboard.keyUp", p.player, Char.box(p.readChar()), Int.box(p.readInt()))
       case _ => // Invalid packet.
     }
 
   def onClipboard(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(s: Screen) =>
+    p.readTileEntity[TileEntity]() match {
+      case Some(t: Screen) =>
         val value = p.readUTF()
-        s.screens.foreach(_.node.sendToNeighbors("keyboard.clipboard", p.player, value))
-      case Some(e) => e.buffer.node.sendToNeighbors("keyboard.clipboard", p.player, p.readUTF())
+        t.screens.foreach(_.node.sendToNeighbors("keyboard.clipboard", p.player, value))
+      case Some(t: Buffer) => t.buffer.node.sendToNeighbors("keyboard.clipboard", p.player, p.readUTF())
+      case Some(t: Rack) => t.terminals(p.readInt()).buffer.node.sendToNeighbors("keyboard.clipboard", p.player, p.readUTF())
       case _ => // Invalid packet.
     }
 
-  def onMouseClick(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(s: Screen) => p.player match {
-        case player: EntityPlayer =>
-          val x = p.readInt()
-          val y = p.readInt()
-          val what = if (p.readBoolean()) "drag" else "touch"
-          s.origin.node.sendToReachable("computer.checked_signal", player, what, Int.box(x), Int.box(y), player.getCommandSenderName)
-        case _ =>
-      }
+  def onMouseClick(p: PacketParser) {
+    p.player match {
+      case player: EntityPlayer =>
+        val node = p.readTileEntity[TileEntity]() match {
+          case Some(t: Screen) => t.origin.node
+          case Some(t: Rack) => t.terminals(p.readInt()).buffer.node
+          case _ => return // Invalid packet.
+        }
+        val x = p.readInt()
+        val y = p.readInt()
+        val what = if (p.readBoolean()) "drag" else "touch"
+        node.sendToReachable("computer.checked_signal", player, what, Int.box(x), Int.box(y), player.getCommandSenderName)
       case _ => // Invalid packet.
     }
+  }
 
-  def onMouseScroll(p: PacketParser) =
-    p.readTileEntity[Buffer]() match {
-      case Some(s: Screen) => p.player match {
-        case player: EntityPlayer =>
-          val x = p.readInt()
-          val y = p.readInt()
-          val scroll = p.readByte()
-          s.origin.node.sendToReachable("computer.checked_signal", player, "scroll", Int.box(x), Int.box(y), Int.box(scroll), player.getCommandSenderName)
-        case _ =>
-      }
+  def onMouseScroll(p: PacketParser) {
+    p.player match {
+      case player: EntityPlayer =>
+        val node = p.readTileEntity[TileEntity]() match {
+          case Some(t: Screen) => t.origin.node
+          case Some(t: Rack) => t.terminals(p.readInt()).buffer.node
+          case _ => return // Invalid packet.
+        }
+        val x = p.readInt()
+        val y = p.readInt()
+        val scroll = p.readByte()
+        node.sendToReachable("computer.checked_signal", player, "scroll", Int.box(x), Int.box(y), Int.box(scroll), player.getCommandSenderName)
       case _ => // Invalid packet.
     }
+  }
 
   def onServerSide(p: PacketParser) =
     p.readTileEntity[Rack]() match {
diff --git a/li/cil/oc/server/PacketSender.scala b/li/cil/oc/server/PacketSender.scala
index 3997a60b6..f1f6ba318 100644
--- a/li/cil/oc/server/PacketSender.scala
+++ b/li/cil/oc/server/PacketSender.scala
@@ -1,6 +1,7 @@
 package li.cil.oc.server
 
 import cpw.mods.fml.common.network.Player
+import li.cil.oc.common
 import li.cil.oc.common.PacketBuilder
 import li.cil.oc.common.PacketType
 import li.cil.oc.common.tileentity._
@@ -156,20 +157,38 @@ object PacketSender {
     pb.sendToNearbyPlayers(t)
   }
 
-  def sendScreenColorChange(t: Buffer, foreground: Int, background: Int) {
+  def sendScreenColorChange(b: common.component.Buffer, foreground: Int, background: Int) {
     val pb = new PacketBuilder(PacketType.ScreenColorChange)
 
-    pb.writeTileEntity(t)
+    val t = b.owner match {
+      case t: Buffer =>
+        pb.writeTileEntity(t)
+        t
+      case t: common.component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+        t.rack
+      case _ => return
+    }
     pb.writeInt(foreground)
     pb.writeInt(background)
 
     pb.sendToNearbyPlayers(t)
   }
 
-  def sendScreenCopy(t: Buffer, col: Int, row: Int, w: Int, h: Int, tx: Int, ty: Int) {
+  def sendScreenCopy(b: common.component.Buffer, col: Int, row: Int, w: Int, h: Int, tx: Int, ty: Int) {
     val pb = new PacketBuilder(PacketType.ScreenCopy)
 
-    pb.writeTileEntity(t)
+    val t = b.owner match {
+      case t: Buffer =>
+        pb.writeTileEntity(t)
+        t
+      case t: common.component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+        t.rack
+      case _ => return
+    }
     pb.writeInt(col)
     pb.writeInt(row)
     pb.writeInt(w)
@@ -180,19 +199,37 @@ object PacketSender {
     pb.sendToNearbyPlayers(t)
   }
 
-  def sendScreenDepthChange(t: Buffer, value: PackedColor.Depth.Value) {
+  def sendScreenDepthChange(b: common.component.Buffer, value: PackedColor.Depth.Value) {
     val pb = new PacketBuilder(PacketType.ScreenDepthChange)
 
-    pb.writeTileEntity(t)
+    val t = b.owner match {
+      case t: Buffer =>
+        pb.writeTileEntity(t)
+        t
+      case t: common.component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+        t.rack
+      case _ => return
+    }
     pb.writeInt(value.id)
 
     pb.sendToNearbyPlayers(t)
   }
 
-  def sendScreenFill(t: Buffer, col: Int, row: Int, w: Int, h: Int, c: Char) {
+  def sendScreenFill(b: common.component.Buffer, col: Int, row: Int, w: Int, h: Int, c: Char) {
     val pb = new PacketBuilder(PacketType.ScreenFill)
 
-    pb.writeTileEntity(t)
+    val t = b.owner match {
+      case t: Buffer =>
+        pb.writeTileEntity(t)
+        t
+      case t: common.component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+        t.rack
+      case _ => return
+    }
     pb.writeInt(col)
     pb.writeInt(row)
     pb.writeInt(w)
@@ -211,20 +248,38 @@ object PacketSender {
     pb.sendToNearbyPlayers(t, 64)
   }
 
-  def sendScreenResolutionChange(t: Buffer, w: Int, h: Int) {
+  def sendScreenResolutionChange(b: common.component.Buffer, w: Int, h: Int) {
     val pb = new PacketBuilder(PacketType.ScreenResolutionChange)
 
-    pb.writeTileEntity(t)
+    val t = b.owner match {
+      case t: Buffer =>
+        pb.writeTileEntity(t)
+        t
+      case t: common.component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+        t.rack
+      case _ => return
+    }
     pb.writeInt(w)
     pb.writeInt(h)
 
     pb.sendToNearbyPlayers(t)
   }
 
-  def sendScreenSet(t: Buffer, col: Int, row: Int, s: String) {
+  def sendScreenSet(b: common.component.Buffer, col: Int, row: Int, s: String) {
     val pb = new PacketBuilder(PacketType.ScreenSet)
 
-    pb.writeTileEntity(t)
+    val t = b.owner match {
+      case t: Buffer =>
+        pb.writeTileEntity(t)
+        t
+      case t: common.component.Terminal =>
+        pb.writeTileEntity(t.rack)
+        pb.writeInt(t.number)
+        t.rack
+      case _ => return
+    }
     pb.writeInt(col)
     pb.writeInt(row)
     pb.writeUTF(s)
@@ -236,7 +291,13 @@ object PacketSender {
     val pb = new PacketBuilder(PacketType.ServerPresence)
 
     pb.writeTileEntity(t)
-    t.servers.foreach(server => pb.writeBoolean(server.isDefined))
+    t.servers.foreach {
+      case Some(server) =>
+        pb.writeBoolean(true)
+        pb.writeUTF(server.machine.address)
+      case _ =>
+        pb.writeBoolean(false)
+    }
 
     pb.sendToNearbyPlayers(t)
   }
diff --git a/li/cil/oc/server/component/Keyboard.scala b/li/cil/oc/server/component/Keyboard.scala
index 26281086c..36fab3a39 100644
--- a/li/cil/oc/server/component/Keyboard.scala
+++ b/li/cil/oc/server/component/Keyboard.scala
@@ -3,7 +3,6 @@ package li.cil.oc.server.component
 import cpw.mods.fml.common.IPlayerTracker
 import li.cil.oc.api.Network
 import li.cil.oc.api.network.{Node, Visibility, Message}
-import li.cil.oc.common.tileentity.Environment
 import net.minecraft.entity.player.EntityPlayer
 import net.minecraftforge.common.MinecraftForge
 import net.minecraftforge.event.{Event, ForgeSubscribe}
@@ -12,7 +11,7 @@ import scala.collection.mutable
 // TODO key up when screen is disconnected from which the key down came
 // TODO key up after load for anything that was pressed
 
-class Keyboard(owner: Environment) extends ManagedComponent {
+abstract class Keyboard extends ManagedComponent {
   val node = Network.newNode(this, Visibility.Network).
     withComponent("keyboard").
     create()
@@ -71,9 +70,7 @@ class Keyboard(owner: Environment) extends ManagedComponent {
 
   // ----------------------------------------------------------------------- //
 
-  def isUseableByPlayer(p: EntityPlayer) =
-    owner.world.getBlockTileEntity(owner.x, owner.y, owner.z) == owner &&
-      p.getDistanceSq(owner.x + 0.5, owner.y + 0.5, owner.z + 0.5) <= 64
+  def isUseableByPlayer(p: EntityPlayer): Boolean
 
   protected def signal(args: AnyRef*) =
     node.sendToReachable("computer.checked_signal", args: _*)
diff --git a/li/cil/oc/server/component/Machine.scala b/li/cil/oc/server/component/Machine.scala
index 7ac2294b2..2758f0cb6 100644
--- a/li/cil/oc/server/component/Machine.scala
+++ b/li/cil/oc/server/component/Machine.scala
@@ -711,6 +711,7 @@ class Machine(val owner: Machine.Owner) extends ManagedComponent with Context wi
                   switchTo(Machine.State.Stopping)
                 }
               case result: ExecutionResult.Error =>
+                crash(result.message)
             }
           case Machine.State.Paused =>
             state.pop() // Paused
diff --git a/li/cil/oc/server/component/Server.scala b/li/cil/oc/server/component/Server.scala
index 4d6015efa..668ac93cd 100644
--- a/li/cil/oc/server/component/Server.scala
+++ b/li/cil/oc/server/component/Server.scala
@@ -29,6 +29,8 @@ class Server(val rack: tileentity.Rack, val number: Int) extends Machine.Owner {
     override def getInventoryStackLimit = 1
   }
 
+  // ----------------------------------------------------------------------- //
+
   def installedMemory = inventory.items.foldLeft(0)((sum, stack) => sum + (stack match {
     case Some(item) => Registry.itemDriverFor(item) match {
       case Some(driver: driver.Memory) => driver.amount(item)
@@ -49,6 +51,8 @@ class Server(val rack: tileentity.Rack, val number: Int) extends Machine.Owner {
 
   def markAsChanged() = rack.markAsChanged()
 
+  // ----------------------------------------------------------------------- //
+
   override def onConnect(node: Node) = inventory.onConnect(node)
 
   override def onDisconnect(node: Node) = inventory.onDisconnect(node)