(1) For the Windows "abort" command, see
Ctrl-Alt-Del.
(2) The key combination in the Mac that enables a user to terminate an unresponsive application. When all three keys are pressed at the same time, the Force Quit utility is launched, which displays all open applications.
A Force Quit Dialog
When a Mac program will not end normally, Force Quit may be an option without having to shut down the computer.