Perhaps off topic, but I bought an altair in 1977 and did a bunch of consulting based on it. Accounts receivable, inventory for a local furniture store. I was insanely excited.

Edit: (In fact when the intel 4004 came out, I was a little frightened that it was going to disrupt our business built on the Sigma 5, but then I realized that it would need software like the stuff we were writing.)