My first computer was a Sinclair ZX81 with a 16k RAM pack. Man, I thought I was in hog heaven with that! For some reason it wouldn't talk to my tape deck (storage) and the RAM pack didn't fit tight so you had to make sure not to jostle the machine, but we had a lot of fun with it. Got rid of it when I upgraded to a Commodore 64. Wish I'd kept it.

Prior to that I also had a Sinclair pocket calculator. That was 1975 when very few calculators were around. It was a great little machine (glowing red numbers) and got me branded by many as a 1970's version of a geek. Don't recall we had an official name like Geek though.