Acorn Electron, about 1985, 32k of memory, and had to load/save everything to cassette tape!!
...lovely shade of beige too!!
Had some great games available though, Elite, Twin Kingdom Valley, Zalaga...brings back memories!!
Elite! That game was awesome. Played it constantly on the BBC, then on the Acorn Archimedes. Never played anything (except maybe C&C) that tied me to my computer for such extended periods.