Ask HN: What are your favorite “retro” electronic products?

For reasonably generous interpretations of "retro". A bit vague, but I'm curious about all the possible categories of electronics.

I have been feeling the urge to pick up a nice old computer/laptop/device as a digital typewriter. I would love for it to have near instant response time and a nice keyboard.

This led me to the question, although I hope the responses aren't limited to that category.