diff --git a/src/main/java/li/cil/oc/api/Manual.java b/src/main/java/li/cil/oc/api/Manual.java
index 655a1bc08..ed13e305b 100644
--- a/src/main/java/li/cil/oc/api/Manual.java
+++ b/src/main/java/li/cil/oc/api/Manual.java
@@ -26,11 +26,12 @@ public class Manual {
      * usually be one, for your main index page.
      *
      * @param renderer the renderer used to render the icon on your tab.
+     * @param tooltip  the unlocalized tooltip of the tab, or <tt>null</tt>.
      * @param path     the path to the page to open when the tab is clicked.
      */
-    public static void addTab(TabIconRenderer renderer, String path) {
+    public static void addTab(TabIconRenderer renderer, String tooltip, String path) {
         if (API.manual != null)
-            API.manual.addTab(renderer, path);
+            API.manual.addTab(renderer, tooltip, path);
     }
 
     /**
diff --git a/src/main/java/li/cil/oc/api/detail/ManualAPI.java b/src/main/java/li/cil/oc/api/detail/ManualAPI.java
index b626c3ddd..3e469dc4f 100644
--- a/src/main/java/li/cil/oc/api/detail/ManualAPI.java
+++ b/src/main/java/li/cil/oc/api/detail/ManualAPI.java
@@ -17,9 +17,10 @@ public interface ManualAPI {
      * usually be one, for your main index page.
      *
      * @param renderer the renderer used to render the icon on your tab.
+     * @param tooltip  the unlocalized tooltip of the tab, or <tt>null</tt>.
      * @param path     the path to the page to open when the tab is clicked.
      */
-    void addTab(TabIconRenderer renderer, String path);
+    void addTab(TabIconRenderer renderer, String tooltip, String path);
 
     /**
      * Register a path provider.
diff --git a/src/main/java/li/cil/oc/api/manual/TabIconRenderer.java b/src/main/java/li/cil/oc/api/manual/TabIconRenderer.java
index 8a0225e27..45b3a329f 100644
--- a/src/main/java/li/cil/oc/api/manual/TabIconRenderer.java
+++ b/src/main/java/li/cil/oc/api/manual/TabIconRenderer.java
@@ -1,5 +1,8 @@
 package li.cil.oc.api.manual;
 
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
+
 /**
  * Allows defining a renderer for a manual tab.
  * <p/>
@@ -18,5 +21,6 @@ public interface TabIconRenderer {
      * This should render something in a 16x16 area. The OpenGL state has been
      * adjusted so that drawing starts at (0,0,0), and should go to (16,16,0).
      */
+    @SideOnly(Side.CLIENT)
     void render();
 }
diff --git a/src/main/java/li/cil/oc/api/prefab/ItemStackTabIconRenderer.java b/src/main/java/li/cil/oc/api/prefab/ItemStackTabIconRenderer.java
index 6281fd588..db8d43be4 100644
--- a/src/main/java/li/cil/oc/api/prefab/ItemStackTabIconRenderer.java
+++ b/src/main/java/li/cil/oc/api/prefab/ItemStackTabIconRenderer.java
@@ -1,5 +1,7 @@
 package li.cil.oc.api.prefab;
 
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
 import li.cil.oc.api.manual.TabIconRenderer;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.OpenGlHelper;
@@ -20,6 +22,7 @@ public class ItemStackTabIconRenderer implements TabIconRenderer {
         this.stack = stack;
     }
 
+    @SideOnly(Side.CLIENT)
     @Override
     public void render() {
         GL11.glEnable(GL12.GL_RESCALE_NORMAL);
diff --git a/src/main/java/li/cil/oc/api/prefab/TextureTabIconRenderer.java b/src/main/java/li/cil/oc/api/prefab/TextureTabIconRenderer.java
index bfb06562b..0a382814b 100644
--- a/src/main/java/li/cil/oc/api/prefab/TextureTabIconRenderer.java
+++ b/src/main/java/li/cil/oc/api/prefab/TextureTabIconRenderer.java
@@ -1,5 +1,7 @@
 package li.cil.oc.api.prefab;
 
+import cpw.mods.fml.relauncher.Side;
+import cpw.mods.fml.relauncher.SideOnly;
 import li.cil.oc.api.manual.TabIconRenderer;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.renderer.Tessellator;
@@ -17,6 +19,7 @@ public class TextureTabIconRenderer implements TabIconRenderer {
     }
 
     @Override
+    @SideOnly(Side.CLIENT)
     public void render() {
         Minecraft.getMinecraft().getTextureManager().bindTexture(location);
         final Tessellator t = Tessellator.instance;
diff --git a/src/main/resources/assets/opencomputers/lang/de_DE.lang b/src/main/resources/assets/opencomputers/lang/de_DE.lang
index ba449824e..bb1ab2800 100644
--- a/src/main/resources/assets/opencomputers/lang/de_DE.lang
+++ b/src/main/resources/assets/opencomputers/lang/de_DE.lang
@@ -183,6 +183,8 @@ oc:gui.Error.NoCPU=Im Computer ist kein Hauptprozessor (CPU) installiert.
 oc:gui.Error.NoEnergy=Nicht genug Energie.
 oc:gui.Error.NoRAM=Im Computer ist kein RAM installiert.
 oc:gui.Error.OutOfMemory=Nicht genug Arbeitsspeicher.
+oc:gui.Manual.Blocks=Blöcke
+oc:gui.Manual.Items=Gegenstände
 oc:gui.Raid.Warning=§4Eine Platte einzufügen löscht sie.[nl] Eine Platte zu entfernen löscht das Raid.
 oc:gui.Robot.Power=Energie
 oc:gui.Robot.TurnOff=Ausschalten
diff --git a/src/main/resources/assets/opencomputers/lang/en_US.lang b/src/main/resources/assets/opencomputers/lang/en_US.lang
index 3da044bb7..44665ed9a 100644
--- a/src/main/resources/assets/opencomputers/lang/en_US.lang
+++ b/src/main/resources/assets/opencomputers/lang/en_US.lang
@@ -183,6 +183,8 @@ oc:gui.Error.NoCPU=No CPU is installed in the computer.
 oc:gui.Error.NoEnergy=Not enough energy.
 oc:gui.Error.NoRAM=No RAM is installed in the computer.
 oc:gui.Error.OutOfMemory=Out of memory.
+oc:gui.Manual.Blocks=Blocks
+oc:gui.Manual.Items=Items
 oc:gui.Raid.Warning=§4Adding a disk wipes it.[nl] Removing a disk wipes the raid.
 oc:gui.Robot.Power=Energy
 oc:gui.Robot.TurnOff=Turn off
diff --git a/src/main/scala/li/cil/oc/client/Manual.scala b/src/main/scala/li/cil/oc/client/Manual.scala
index 1c8c6e38f..247f68fde 100644
--- a/src/main/scala/li/cil/oc/client/Manual.scala
+++ b/src/main/scala/li/cil/oc/client/Manual.scala
@@ -24,7 +24,7 @@ object Manual extends ManualAPI {
 
   class History(val path: String, var offset: Int = 0)
 
-  class Tab(val renderer: TabIconRenderer, val path: String)
+  class Tab(val renderer: TabIconRenderer, val tooltip: Option[String], val path: String)
 
   val tabs = mutable.Buffer.empty[Tab]
 
@@ -36,8 +36,8 @@ object Manual extends ManualAPI {
 
   reset()
 
-  override def addTab(renderer: TabIconRenderer, path: String): Unit = {
-    tabs += new Tab(renderer, path)
+  override def addTab(renderer: TabIconRenderer, tooltip: String, path: String): Unit = {
+    tabs += new Tab(renderer, Option(tooltip), path)
   }
 
   override def addProvider(provider: PathProvider): Unit = {
diff --git a/src/main/scala/li/cil/oc/client/gui/Manual.scala b/src/main/scala/li/cil/oc/client/gui/Manual.scala
index 8125c7aae..91cfab3bc 100644
--- a/src/main/scala/li/cil/oc/client/gui/Manual.scala
+++ b/src/main/scala/li/cil/oc/client/gui/Manual.scala
@@ -5,8 +5,8 @@ import java.util
 
 import li.cil.oc.Localization
 import li.cil.oc.api
-import li.cil.oc.client.Manual
 import li.cil.oc.client.Textures
+import li.cil.oc.client.{Manual => ManualAPI}
 import li.cil.oc.util.PseudoMarkdown
 import net.minecraft.client.Minecraft
 import net.minecraft.client.gui.Gui
@@ -43,7 +43,7 @@ class Manual extends GuiScreen {
 
   private def canScroll = maxOffset > 0
 
-  def offset = Manual.history.top.offset
+  def offset = ManualAPI.history.top.offset
 
   def maxOffset = documentHeight - documentMaxHeight
 
@@ -58,21 +58,21 @@ class Manual extends GuiScreen {
     }
 
   def refreshPage(): Unit = {
-    document = PseudoMarkdown.parse(api.Manual.contentFor(Manual.history.top.path))
+    document = PseudoMarkdown.parse(api.Manual.contentFor(ManualAPI.history.top.path))
     documentHeight = PseudoMarkdown.height(document, documentMaxWidth, fontRendererObj)
     scrollTo(offset)
   }
 
   def pushPage(path: String): Unit = {
-    if (path != Manual.history.top.path) {
-      Manual.history.push(new Manual.History(path))
+    if (path != ManualAPI.history.top.path) {
+      ManualAPI.history.push(new ManualAPI.History(path))
       refreshPage()
     }
   }
 
   def popPage(): Unit = {
-    if (Manual.history.size > 1) {
-      Manual.history.pop()
+    if (ManualAPI.history.size > 1) {
+      ManualAPI.history.pop()
       refreshPage()
     }
     else {
@@ -83,8 +83,8 @@ class Manual extends GuiScreen {
   override def doesGuiPauseGame = false
 
   override def actionPerformed(button: GuiButton): Unit = {
-    if (button.id >= 0 && button.id < Manual.tabs.length) {
-      api.Manual.navigate(Manual.tabs(button.id).path)
+    if (button.id >= 0 && button.id < ManualAPI.tabs.length) {
+      api.Manual.navigate(ManualAPI.tabs(button.id).path)
     }
   }
 
@@ -103,7 +103,7 @@ class Manual extends GuiScreen {
     scrollButton = new ImageButton(-1, guiLeft + scrollPosX, guiTop + scrollPosY, 6, 13, Textures.guiButtonScroll)
     add(buttonList, scrollButton)
 
-    for ((tab, i) <- Manual.tabs.zipWithIndex if i < 7) {
+    for ((tab, i) <- ManualAPI.tabs.zipWithIndex if i < 7) {
       val x = guiLeft + tabPosX
       val y = guiTop + tabPosY + i * (tabHeight - 1)
       add(buttonList, new ImageButton(i, x, y, tabWidth, tabHeight, Textures.guiManualTab))
@@ -121,7 +121,7 @@ class Manual extends GuiScreen {
 
     super.drawScreen(mouseX, mouseY, dt)
 
-    for ((tab, i) <- Manual.tabs.zipWithIndex if i < 7) {
+    for ((tab, i) <- ManualAPI.tabs.zipWithIndex if i < 7) {
       val x = guiLeft + tabPosX
       val y = guiTop + tabPosY + i * (tabHeight - 1)
       GL11.glPushMatrix()
@@ -133,12 +133,20 @@ class Manual extends GuiScreen {
     PseudoMarkdown.render(document, guiLeft + 8, guiTop + 8, documentMaxWidth, documentMaxHeight, offset, fontRendererObj, mouseX, mouseY) match {
       case Some(segment) =>
         segment.tooltip match {
-          case Some(text) if text.nonEmpty => drawHoveringText(seqAsJavaList(text.lines.toSeq), mouseX, mouseY, fontRendererObj)
+          case Some(text) if text.nonEmpty => drawHoveringText(seqAsJavaList(Localization.localizeImmediately(text).lines.toSeq), mouseX, mouseY, fontRendererObj)
           case _ =>
         }
         hoveredLink = segment.link
       case _ => hoveredLink = None
     }
+
+    for ((tab, i) <- ManualAPI.tabs.zipWithIndex if i < 7) {
+      val x = guiLeft + tabPosX
+      val y = guiTop + tabPosY + i * (tabHeight - 1)
+      if (mouseX > x && mouseX < x + tabWidth && mouseY > y && mouseY < y + tabHeight) tab.tooltip.foreach(text => {
+        drawHoveringText(seqAsJavaList(Localization.localizeImmediately(text).lines.toSeq), mouseX, mouseY, fontRendererObj)
+      })
+    }
   }
 
   override protected def mouseMovedOrUp(mouseX: Int, mouseY: Int, button: Int) {
@@ -159,7 +167,7 @@ class Manual extends GuiScreen {
       // Left click, did we hit a link?
       hoveredLink.foreach(link => {
         if (link.startsWith("http://") || link.startsWith("https://")) handleUrl(link)
-        else pushPage(Manual.makeRelative(link, Manual.history.top.path))
+        else pushPage(ManualAPI.makeRelative(link, ManualAPI.history.top.path))
       })
     }
     else if (button == 1) {
@@ -204,7 +212,7 @@ class Manual extends GuiScreen {
   private def scrollDown() = scrollTo(offset + PseudoMarkdown.lineHeight(fontRendererObj) * 3)
 
   private def scrollTo(row: Int): Unit = {
-    Manual.history.top.offset = math.max(0, math.min(maxOffset, row))
+    ManualAPI.history.top.offset = math.max(0, math.min(maxOffset, row))
     val yMin = guiTop + scrollPosY
     if (maxOffset > 0) {
       scrollButton.yPosition = yMin + (scrollHeight - 13) * offset / maxOffset
diff --git a/src/main/scala/li/cil/oc/integration/opencomputers/ModOpenComputers.scala b/src/main/scala/li/cil/oc/integration/opencomputers/ModOpenComputers.scala
index d181f46e4..0c48a2385 100644
--- a/src/main/scala/li/cil/oc/integration/opencomputers/ModOpenComputers.scala
+++ b/src/main/scala/li/cil/oc/integration/opencomputers/ModOpenComputers.scala
@@ -200,8 +200,8 @@ object ModOpenComputers extends ModProxy {
     api.Manual.addProvider(DefinitionPathProvider)
     api.Manual.addProvider(new ResourceContentProvider(Settings.resourceDomain))
 
-    api.Manual.addTab(new ItemStackTabIconRenderer(api.Items.get("case1").createItemStack(1)), "doc/%LANGUAGE%/block/index.md")
-    api.Manual.addTab(new ItemStackTabIconRenderer(api.Items.get("chip1").createItemStack(1)), "doc/%LANGUAGE%/item/index.md")
+    api.Manual.addTab(new ItemStackTabIconRenderer(api.Items.get("case1").createItemStack(1)), "oc:gui.Manual.Blocks", "doc/%LANGUAGE%/block/index.md")
+    api.Manual.addTab(new ItemStackTabIconRenderer(api.Items.get("chip1").createItemStack(1)), "oc:gui.Manual.Items", "doc/%LANGUAGE%/item/index.md")
   }
 
   private def blacklistHost(host: Class[_], itemNames: String*) {
@@ -231,8 +231,8 @@ object ModOpenComputers extends ModProxy {
 
     private def checkBlacklisted(info: ItemInfo): String =
       if (info == null || Blacklist.contains(info.name)) null
-      else if (info.block != null) "block/" + info.name + ".md"
-      else "item/" + info.name + ".md"
+      else if (info.block != null) "doc/%LANGUAGE%/block/" + info.name + ".md"
+      else "doc/%LANGUAGE%/item/" + info.name + ".md"
   }
 
 }