RTFS = R = RTM

RTI /R-T-I/ interj.

The mnemonic for the `return from interrupt' instruction on many computers including the 6502 and 6800. The variant `RETI' is found among Z80 hackers. Equivalent to "Now, where was I?" or used to end a conversational digression. See pop; see also POPJ.

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.

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