The MAC keyboard although similar to a standard PC keyboard, does have some Mac specific keys. These keys allow access to those special mac features. Below is a quick list of these keys, and a basic list of some common useful keyboard shortcuts.

Mac specific keys 

Dashboard key, Opens up the dashboard and display any widgets that have been setup.

 dashboard key

Expose key is a feature of the Mac OS X operating system, Expose gives the user a quick preview of all open windows.

Command key, is equivalent to the Windows key on a standard keyboard.

command key

Options key, This key is equivalent to the ALT key on a normal keyboard.

options key

Useful shortcuts

Command-X Cut

cut

Command-C Copy

copy

Command-V Paste

 paste

Command-D Duplicate selected item

duplicate

Command-N New Finder window

new window

Command-M Minimize window

minimize window