It was built by Rockwell, the same company which built the space shuttle ! https://en.wikipedia.org/wiki/AIM-65 It was the advance model with a whopping 4kB of RAM vs the entry level mode with only 1kB. In terms of software: A macro assembler, a BASIC and a Forth interpreter. To switch from one to the other ROM chips had to be swapped out, none of this modern floppy disk stuff. All signals where slow and easy to probe with an oscilloscope and it was easy to make simple mods with 74xx or 4xxx series logic ICs. And it still works when I switch it on in a nostalgic moment.