Microsoft
Microsoft: Keyboard Shortcuts for Windows
This reference from Microsoft lists the keyboard shortcuts you can use in Windows.
Computer Hope
Computer Hope: Apple Computer Shortcut Keys
Shortcut keys help provide an easier and usually quicker method of navigating and using computer software programs. Here is a listing of Apple Mac OS keyboard shortcuts.
Computer Hope
Computer Hope: Unix / Linux Shortcut Keys
Shortcut keys help provide an easier and usually quicker method of navigating and using computer software programs. Here is a listing of keyboard shortcuts for UNIX / Linux opearting systems.
Computer Hope
Computer Hope: Microsoft Shortcut Keys
Explains basic key terminology and computer shortcut keys (keyboard shortcuts), and lists shortcuts for these Microsoft applications: Windows, Excel, Word, Internet Explorer, FrontPage, and Outlook.