diff --git a/src/lime/system/Clipboard.hx b/src/lime/system/Clipboard.hx
index 3bd98914b..cdd15d263 100644
--- a/src/lime/system/Clipboard.hx
+++ b/src/lime/system/Clipboard.hx
@@ -9,6 +9,9 @@ import flash.desktop.Clipboard as FlashClipboard;
 import lime._internal.backend.html5.HTML5Window;
 #end
 
+/**
+	Reads and writes text on the system clipboard.
+**/
 #if !lime_debug
 @:fileXml('tags="haxe,release"')
 @:noDebug
@@ -17,8 +20,16 @@ import lime._internal.backend.html5.HTML5Window;
 @:access(lime.ui.Window)
 class Clipboard
 {
+	/**
+		Dispatched when the clipboard text changes.
+	**/
 	public static var onUpdate = new Event<Void->Void>();
+
+	/**
+		The text currently stored in the clipboard.
+	**/
 	public static var text(get, set):String;
+
 	private static var _text:String;
 	@:noCompletion private static var __updated = false;
 
diff --git a/src/lime/system/System.hx b/src/lime/system/System.hx
index 005061521..69f805895 100644
--- a/src/lime/system/System.hx
+++ b/src/lime/system/System.hx
@@ -25,6 +25,9 @@ import js.Browser;
 import sys.io.Process;
 #end
 
+/**
+	Access operating system level settings and operations.
+**/
 #if !lime_debug
 @:fileXml('tags="haxe,release"')
 @:noDebug
@@ -44,21 +47,68 @@ extern "C" {
 #end
 class System
 {
+	/**
+		Determines if the screen saver is allowed to start or not.
+	**/
 	public static var allowScreenTimeout(get, set):Bool;
+
+	/**
+		The path to the directory where the application is installed, along with
+		its supporting files. In many cases, this directory is read-only, and
+		attempts to write to files, create new files, or delete files in this
+		directory are likely fail.
+	**/
 	public static var applicationDirectory(get, never):String;
+
+	/**
+		The application's dedicated storage directory, which unique to each
+		application and user. Useful for storing settings on a user-specific
+		and application-specific basis.
+
+		This directory may or may not be removed when the application is
+		uninstalled, and it depends on the platform and installer technology
+		that is used.
+	**/
 	public static var applicationStorageDirectory(get, never):String;
+
+	/**
+		The path to the directory containing the user's desktop.
+	**/
 	public static var desktopDirectory(get, never):String;
+
 	public static var deviceModel(get, never):String;
 	public static var deviceVendor(get, never):String;
 	public static var disableCFFI:Bool;
+
+	/**
+		The path to the directory containing the user's documents.
+	**/
 	public static var documentsDirectory(get, never):String;
+
+	/**
+		The platform's default endianness for bytes.
+	**/
 	public static var endianness(get, never):Endian;
+
+	/**
+		The path to the directory where fonts are installed.
+	**/
 	public static var fontsDirectory(get, never):String;
+
+	/**
+		The number of available video displays.
+	**/
 	public static var numDisplays(get, never):Int;
+
 	public static var platformLabel(get, never):String;
 	public static var platformName(get, never):String;
 	public static var platformVersion(get, never):String;
+
+	/**
+		The path to the user's home directory.
+	**/
 	public static var userDirectory(get, never):String;
+
 	@:noCompletion private static var __applicationDirectory:String;
 	@:noCompletion private static var __applicationEntryPoint:Map<String, Function>;
 	@:noCompletion private static var __applicationStorageDirectory:String;
@@ -139,6 +189,10 @@ class System
 	#end
 
 	#if (!lime_doc_gen || sys)
+	/**
+		Attempts to exit the application. Dispatches `onExit`, and will not
+		exit if the event is canceled.
+	**/
 	public static function exit(code:Int):Void
 	{
 		var currentApp = Application.current;
@@ -167,6 +221,9 @@ class System
 	}
 	#end
 
+	/**
+		Returns information about the video display with the specified ID.
+	**/
 	public static function getDisplay(id:Int):Display
 	{
 		#if (lime_cffi && !macro)
@@ -265,6 +322,9 @@ class System
 		return null;
 	}
 
+	/**
+		The number of milliseconds since the application was initialized.
+	**/
 	public static function getTimer():Int
 	{
 		#if flash
@@ -293,6 +353,11 @@ class System
 	}
 	#end
 
+	/**
+		Opens a file with the suste, default application.
+
+		In a web browser, opens a URL with target `_blank`.
+	**/
 	public static function openFile(path:String):Void
 	{
 		if (path != null)
@@ -316,6 +381,9 @@ class System
 		}
 	}
 
+	/**
+		Opens a URL with the specified target web browser window.
+	**/
 	public static function openURL(url:String, target:String = "_blank"):Void
 	{
 		if (url != null)