Atari ST, you can tell by the monitor. The Amiga 500 is in the box. Or II Very probable given the monitor CBM 2001 specifically Either a CBM 2001 full size keyboard or a 4000 series. Probably an 8000 series Impossible to tell the difference visually without looking at the back Plus, the two TRS-80 model I's with expansion interfaces on top of the first two PETs, and some kind of probable microprocessor trainer to the left of the Altair. Kai