HEATHKIT / ZENITH H-89 was sold under the two names: Heathkit H-89 and Zenith Data Systems Z-89. The H-89 was sold in kit form, the Z-89 came assembled. It originally came with 16 KB of memory, later versions provided up to 48 KB on the main CPU board (in groups of 1 KB chips). Zenith and Heathkit offered a 16 KB expansion card for a total of 64 KB when using CP/M.
Rockwell International AIM 65 computer was designed to be a development system for 6502 based computers. It had no display except for a small 20 character LED screen and a very small thermal printer located directly on the motherboard which could print everything that was typed on the keyboard.