Was a KIM-1. In 1978. Nothing more than an 8.5 by 11 circuit board with a 6502 processor, 1K RAM, 4K ROM. 21 key HEX keypad and 6 7-segment displays. Storage was on audio cassette tape. No case, no power supply included.

And it was incredible! I hardly went to bed at night for the first month I had it. Ever play Wumpus?