Three-finger salute

The three-finger salute (also known as the "Vulcan nerve pinch" or "Vulcan death grip" from the original Star Trek TV series) is the keyboard combination that forces a soft boot or jump to ROM monitor (on machines that support such a feature).

Platform	Key combo	Function
Amiga	Ctrl + Left Amiga + Right Amiga	Reboot the machine
some Amigas	Ctrl + Commodore + Amiga	Reboot the machine
IBM PC under DOS	Ctrl + Alt + Del	Reboot the machine
IBM PC under Windows	Ctrl + Alt + Del	Bring up login screen or enter task manager
IBM PC under other OS	Ctrl + Alt + Del	Often, but not always configured to reboot
Sun workstation	L1/Stop? + A	Enter ROM monitor
Sun workstation (serial console)	Break	Enter ROM monitor
Apple II family machines	Ctrl + Reset	Enters the monitor or ROM BASIC
	Ctrl + Cmd + Reset	Reboot the machine
	Ctrl + Option + Reset	Enter BIOS setup, then reboot
	Ctrl + Option + Apple + Reset	Self-test, then reboot
Some Macintosh computers	Cmd + Power	Enter monitor
	Control + Cmd + Power	Reboot the machine
Mac OSX	Command + Option + Esc	Force quit applications
SGI workstation	Left Shift + Left Ctrl + Left Alt + Keypad Divide + F12

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Article based on [Three-finger salute] at [FOLDOC], used with permission.