JargonFile/entries/priority interrupt.txt

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priority interrupt
n. [from the hardware term] Describes any stimulus compelling enough to yank
one right out of hack mode. Classically used to describe being dragged away
by an SO for immediate sex, but may also refer to more mundane interruptions
such as a fire alarm going off in the near vicinity. Also called an NMI
(non-maskable interrupt), especially in PC-land.