Via https://en.wikipedia.org/wiki/PEEK_and_POKE https://en.wikipedia.org/wiki/PEEK_and_POKE: > One of the earliest references to these commands in BASIC, if no

Via https://en.wikipedia.org/wiki/PEEK_and_POKE https://en.wikipedia.org/wiki/PEEK_and_POKE: > One of the earliest references to these commands in BASIC, if not the earliest, is in Altair BASIC[4]. [4] https://archive.org/stream/bitsavers_mitsMITSAl_6669937/MITS_AltairBASIC_1975#page/n3/mode/1up https://archive.org/stream/bitsavers_mitsMITSAl_6669937/MITS... So, it seems to date back to 1975.