Answer: esc

AnswerCrossword Clue
ESCPC "Go back!" key
ESCTop-left PC key
ESCExit-the-program key
ESCUpper-left key, often
ESC"Exit full-screen mode" key, often
ESC"Never mind" key
ESCKey in a corner
ESCPC's undo key
ESCKey to getting out of trouble?
ESCCorner key on a PC
ESCIt's left of "F1" on a PC keyboard
ESCBailout key
ESCCorner key
ESCImportant PC feature
ESCKey that takes you back
ESCKey to getting out of a jam?
ESCCorner PC key
ESCF1 neighbor, on PCs
ESCMtge. subject
ESCPC key near F1
ESCMac key
ESCKey for naughty surfers?
ESCPC panic button
ESCComputer key
ESCKey in the top left, usually
ESCKey used to hide NSFW content
ESCKey for closing a window, say
ESCKey on a Packard Bell, e.g.
ESCLetters with a tilde underneath
ESCYou can press it instead of clicking Cancel
ESCButton pressed in a moment of panic
ESCPC key
ESCNSFW key-at-the-ready
ESCIt's pressed in the corner
ESCUpper-left key
ESCPC "oops" key
ESCPC's panic button
ESCLaptop's panic-button
ESCEmergency PC key
ESCPC bailout key