Which keyboard shortcut will UNDO a task just completed in most windows applications?
Ctrl + Z is the default undo command and Ctrl + Y is redo. Here
are a few others from the top of my memory:
Ctrl + Q = Quit
Ctrl + W = Close window
Ctrl + O = Open
Ctrl + P = Print
Ctrl + A = Select all
Ctrl + S = Save
Ctrl + X = Cut
Ctrl + C = Copy
Ctrl + V = Paste
Ctrl + N = New