Option-Commnad-Esc = Force quit applicaiton(s)

Command-Tab = Switch windows

Command-Q = Quit application

Command-Shift-Q = Log out

Command-S = Save

Command-W = Close windows

Command-A = Select all

Command-C = Copy

Command-X = Cut

Command-V = Paste

Command-Z = Undo

Command-P = Print

Command-M = Minimize windows

Command-F = Find

Command-I = Get Info

Command-Shift-3 = Take screen shot

Command-Shift-4 = Take screen shot of selected material