Return from interrupt

from The Free On-line Dictionary of Computing (8 July 2008)

return from interrupt

   <programming> (RTI) An instruction {mnemonic} on many
   computers including the {6502} and {6800}.  The variant "RETI"
   is found among former {Zilog Z80} hackers (almost nobody
   programs these things in {assembly code} anymore).  The {Intel
   80x86} equivalent is "IRET".

   (1994-10-31)