diff --git a/assets/opencomputers/lang/de_DE.lang b/assets/opencomputers/lang/de_DE.lang
index 9e841d9ec..ff30b8b2f 100644
--- a/assets/opencomputers/lang/de_DE.lang
+++ b/assets/opencomputers/lang/de_DE.lang
@@ -9,8 +9,8 @@ oc.block.ScreenBasic.name=Einfacher Bildschirm
 oc.block.ScreenProfessional.name=Professioneller Bildschirm
 oc.container.Computer=Computer
 oc.container.DiskDrive=Diskettenlaufwerk
+oc.item.Analyzer.name=Messgerät
 oc.item.Disk.name=Diskette
-oc.item.GraphicsCard.name=
 oc.item.GraphicsCardAdvanced.name=Hochwertige Grafikkarte
 oc.item.GraphicsCardBasic.name=Einfache Grafikkarte
 oc.item.GraphicsCardProfessional.name=Professionelle Grafikkarte
diff --git a/assets/opencomputers/lang/en_US.lang b/assets/opencomputers/lang/en_US.lang
index bb260863f..595c6651a 100644
--- a/assets/opencomputers/lang/en_US.lang
+++ b/assets/opencomputers/lang/en_US.lang
@@ -9,6 +9,7 @@ oc.block.ScreenBasic.name=Basic Screen
 oc.block.ScreenProfessional.name=Professional Screen
 oc.container.Computer=Computer
 oc.container.DiskDrive=Disk Drive
+oc.item.Analyzer.name=Analyzer
 oc.item.Disk.name=Floppy Disk
 oc.item.GraphicsCardAdvanced.name=Advanced Graphics Card
 oc.item.GraphicsCardBasic.name=Basic Graphics Card
diff --git a/assets/opencomputers/textures/items/analyzer.png b/assets/opencomputers/textures/items/analyzer.png
new file mode 100644
index 000000000..cb308a191
Binary files /dev/null and b/assets/opencomputers/textures/items/analyzer.png differ
diff --git a/li/cil/oc/Items.scala b/li/cil/oc/Items.scala
index 860c115f5..a2f0a84b4 100644
--- a/li/cil/oc/Items.scala
+++ b/li/cil/oc/Items.scala
@@ -23,6 +23,8 @@ object Items {
   var hdd3: item.HardDiskDrive = null
   var disk: item.Disk = null
 
+  var analyzer: item.Analyzer = null
+
   def init() {
     multi = new item.Delegator(Config.itemId)
 
@@ -44,5 +46,7 @@ object Items {
 
     psu = new item.PowerSupply(multi)
     wlan = new item.WirelessNetworkCard(multi)
+
+    analyzer = new item.Analyzer(multi)
   }
 }
\ No newline at end of file
diff --git a/li/cil/oc/client/PacketHandler.scala b/li/cil/oc/client/PacketHandler.scala
index 589d9540a..be2e84573 100644
--- a/li/cil/oc/client/PacketHandler.scala
+++ b/li/cil/oc/client/PacketHandler.scala
@@ -5,6 +5,7 @@ import li.cil.oc.common.PacketType
 import li.cil.oc.common.tileentity.{PowerDistributor, Computer, Rotatable, Screen}
 import li.cil.oc.common.{PacketHandler => CommonPacketHandler}
 import li.cil.oc.server.component.Redstone
+import net.minecraft.client.gui.GuiScreen
 import net.minecraft.entity.player.EntityPlayer
 import net.minecraft.tileentity.TileEntity
 import net.minecraftforge.common.ForgeDirection
@@ -18,6 +19,7 @@ class PacketHandler extends CommonPacketHandler {
 
   override def dispatch(p: PacketParser) =
     p.packetType match {
+      case PacketType.Clipboard => onClipboard(p)
       case PacketType.ComputerStateResponse => onComputerStateResponse(p)
       case PacketType.PowerStateResponse => onPowerStateResponse(p)
       case PacketType.RedstoneStateResponse => onRedstoneStateResponse(p)
@@ -30,6 +32,11 @@ class PacketHandler extends CommonPacketHandler {
       case _ => // Invalid packet.
     }
 
+  def onClipboard(p: PacketParser) = {
+    GuiScreen.setClipboardString(p.readUTF())
+    p.player.asInstanceOf[EntityPlayer].addChatMessage("Copied to clipboard.")
+  }
+
   def onComputerStateResponse(p: PacketParser) =
     p.readTileEntity[Computer]() match {
       case Some(t) => {
diff --git a/li/cil/oc/common/block/Delegator.scala b/li/cil/oc/common/block/Delegator.scala
index acf822525..868e72176 100644
--- a/li/cil/oc/common/block/Delegator.scala
+++ b/li/cil/oc/common/block/Delegator.scala
@@ -2,10 +2,9 @@ package li.cil.oc.common.block
 
 import cpw.mods.fml.common.registry.GameRegistry
 import java.util
-import li.cil.oc.Config
-import li.cil.oc.CreativeTab
 import li.cil.oc.api.network.Environment
 import li.cil.oc.common.tileentity.Rotatable
+import li.cil.oc.{Items, Config, CreativeTab}
 import net.minecraft.block.Block
 import net.minecraft.block.material.Material
 import net.minecraft.client.renderer.texture.IconRegister
@@ -234,6 +233,10 @@ class Delegator[Child <: Delegate](id: Int) extends Block(id, Material.iron) {
     }
 
   override def onBlockActivated(world: World, x: Int, y: Int, z: Int, player: EntityPlayer, side: Int, hitX: Float, hitY: Float, hitZ: Float): Boolean = {
+    // Do nothing if we have an analyzer in hand.
+    if (Items.analyzer.equals(player.getCurrentEquippedItem))
+      return false
+
     // Helper method to detect items that can be used to rotate blocks, such as
     // wrenches. This structural type is compatible with the BuildCraft wrench
     // interface.
diff --git a/li/cil/oc/common/item/Analyzer.scala b/li/cil/oc/common/item/Analyzer.scala
new file mode 100644
index 000000000..2fb3d100d
--- /dev/null
+++ b/li/cil/oc/common/item/Analyzer.scala
@@ -0,0 +1,54 @@
+package li.cil.oc.common.item
+
+import cpw.mods.fml.common.network.Player
+import li.cil.oc.Config
+import li.cil.oc.api.network.Environment
+import li.cil.oc.common.tileentity
+import li.cil.oc.server.PacketSender
+import net.minecraft.client.renderer.texture.IconRegister
+import net.minecraft.entity.player.EntityPlayer
+import net.minecraft.item.ItemStack
+import net.minecraft.world.World
+
+class Analyzer(val parent: Delegator) extends Delegate {
+  val unlocalizedName = "Analyzer"
+
+  override def onItemUse(item: 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 computer: tileentity.Computer =>
+        if (!world.isRemote) {
+          computer.instance.lastError match {
+            case Some(value) => player.addChatMessage("Last error: " + value)
+            case _ =>
+          }
+          processAddress(computer, player)
+        }
+        true
+      case screen: tileentity.Screen =>
+        if (!world.isRemote) {
+          processAddress(screen.origin, player)
+        }
+        true
+      case environment: Environment =>
+        if (!world.isRemote) {
+          processAddress(environment, player)
+        }
+        true
+      case _ => super.onItemUse(item, player, world, x, y, z, side, hitX, hitY, hitZ)
+    }
+  }
+
+  private def processAddress(environment: Environment, player: EntityPlayer) {
+    val address = environment.node.address()
+    player.addChatMessage("Address: " + address)
+    if (player.isSneaking) {
+      PacketSender.sendClipboard(address, player.asInstanceOf[Player])
+    }
+  }
+
+  override def registerIcons(iconRegister: IconRegister) {
+    super.registerIcons(iconRegister)
+
+    icon = iconRegister.registerIcon(Config.resourceDomain + ":analyzer")
+  }
+}
diff --git a/li/cil/oc/common/item/Delegate.scala b/li/cil/oc/common/item/Delegate.scala
index b06b5d5d4..a3fc51ed4 100644
--- a/li/cil/oc/common/item/Delegate.scala
+++ b/li/cil/oc/common/item/Delegate.scala
@@ -30,4 +30,7 @@ trait Delegate {
   def onItemUse(item: ItemStack, player: EntityPlayer, world: World, x: Int, y: Int, z: Int, side: Int, hitX: Float, hitY: Float, hitZ: Float): Boolean = false
 
   def registerIcons(iconRegister: IconRegister) {}
+
+  def equals(item: ItemStack) =
+    item != null && item.itemID == parent.itemID && parent.subItem(item).exists(_.itemId == itemId)
 }
diff --git a/li/cil/oc/common/tileentity/Computer.scala b/li/cil/oc/common/tileentity/Computer.scala
index 5d5baa745..481ab5a2c 100644
--- a/li/cil/oc/common/tileentity/Computer.scala
+++ b/li/cil/oc/common/tileentity/Computer.scala
@@ -75,8 +75,7 @@ class Computer(isClient: Boolean) extends Rotatable with ComputerEnvironment wit
       // otherwise loose track of its screen).
       instance.update()
       if (isRunning && !node.changeBuffer(-Config.computerBaseCost)) {
-        // TODO try to print to screen? sound effect? particle effect?
-        println("not enough power, shutting down... ")
+        instance.lastError = "not enough power"
         turnOff()
       }
       if (hasChanged) {
diff --git a/li/cil/oc/server/PacketSender.scala b/li/cil/oc/server/PacketSender.scala
index 8eba1c3d3..46072134a 100644
--- a/li/cil/oc/server/PacketSender.scala
+++ b/li/cil/oc/server/PacketSender.scala
@@ -10,7 +10,15 @@ import net.minecraftforge.common.ForgeDirection
 
 /** Centralized packet dispatcher for sending updates to the client. */
 object PacketSender {
-  def sendComputerState(t: TileEntity, value: Boolean, player: Option[Player] = None) = {
+  def sendClipboard(value: String, player: Player) {
+    val pb = new PacketBuilder(PacketType.Clipboard)
+
+    pb.writeUTF(value)
+
+    pb.sendToPlayer(player)
+  }
+
+  def sendComputerState(t: TileEntity, value: Boolean, player: Option[Player] = None) {
     val pb = new PacketBuilder(PacketType.ComputerStateResponse)
 
     pb.writeTileEntity(t)
@@ -22,7 +30,7 @@ object PacketSender {
     }
   }
 
-  def sendPowerState(t: PowerDistributor, player: Option[Player] = None) = {
+  def sendPowerState(t: PowerDistributor, player: Option[Player] = None) {
     val pb = new PacketBuilder(PacketType.PowerStateResponse)
 
     pb.writeTileEntity(t)
@@ -34,7 +42,7 @@ object PacketSender {
     }
   }
 
-  def sendRedstoneState(t: TileEntity with Redstone, player: Option[Player] = None) = {
+  def sendRedstoneState(t: TileEntity with Redstone, player: Option[Player] = None) {
     val pb = new PacketBuilder(PacketType.RedstoneStateResponse)
 
     pb.writeTileEntity(t)
@@ -49,7 +57,7 @@ object PacketSender {
     }
   }
 
-  def sendRotatableState(t: Rotatable, player: Option[Player] = None) = {
+  def sendRotatableState(t: Rotatable, player: Option[Player] = None) {
     val pb = new PacketBuilder(PacketType.RotatableStateResponse)
 
     pb.writeTileEntity(t)
@@ -62,7 +70,7 @@ object PacketSender {
     }
   }
 
-  def sendScreenBufferState(t: TileEntity, w: Int, h: Int, text: String, player: Option[Player] = None) = {
+  def sendScreenBufferState(t: TileEntity, w: Int, h: Int, text: String, player: Option[Player] = None) {
     val pb = new PacketBuilder(PacketType.ScreenBufferResponse)
 
     pb.writeTileEntity(t)
@@ -76,7 +84,7 @@ object PacketSender {
     }
   }
 
-  def sendScreenCopy(t: TileEntity, col: Int, row: Int, w: Int, h: Int, tx: Int, ty: Int) = {
+  def sendScreenCopy(t: TileEntity, col: Int, row: Int, w: Int, h: Int, tx: Int, ty: Int) {
     val pb = new PacketBuilder(PacketType.ScreenCopy)
 
     pb.writeTileEntity(t)
@@ -90,7 +98,7 @@ object PacketSender {
     pb.sendToAllPlayers()
   }
 
-  def sendScreenFill(t: TileEntity, col: Int, row: Int, w: Int, h: Int, c: Char) = {
+  def sendScreenFill(t: TileEntity, col: Int, row: Int, w: Int, h: Int, c: Char) {
     val pb = new PacketBuilder(PacketType.ScreenFill)
 
     pb.writeTileEntity(t)
@@ -103,7 +111,7 @@ object PacketSender {
     pb.sendToAllPlayers()
   }
 
-  def sendScreenResolutionChange(t: TileEntity, w: Int, h: Int) = {
+  def sendScreenResolutionChange(t: TileEntity, w: Int, h: Int) {
     val pb = new PacketBuilder(PacketType.ScreenResolutionChange)
 
     pb.writeTileEntity(t)
@@ -113,7 +121,7 @@ object PacketSender {
     pb.sendToAllPlayers()
   }
 
-  def sendScreenSet(t: TileEntity, col: Int, row: Int, s: String) = {
+  def sendScreenSet(t: TileEntity, col: Int, row: Int, s: String) {
     val pb = new PacketBuilder(PacketType.ScreenSet)
 
     pb.writeTileEntity(t)
diff --git a/li/cil/oc/server/component/Computer.scala b/li/cil/oc/server/component/Computer.scala
index bd6593eb1..7c7272fbc 100644
--- a/li/cil/oc/server/component/Computer.scala
+++ b/li/cil/oc/server/component/Computer.scala
@@ -77,6 +77,10 @@ class Computer(val owner: Computer.Environment) extends Persistable with Runnabl
       lua.setTotalMemory(kernelMemory + owner.installedMemory)
   })
 
+  def lastError = message
+
+  def lastError_=(value: String) = message = Option(value)
+
   // ----------------------------------------------------------------------- //
 
   def start() = state.synchronized(owner.node.network != null &&