Before the IBM PC, There Was the TRS-80

Radio Shack, known for its DIY kits and gear, unveiled this low-cost computer in 1977 in a bid to capture the fledgling PC market.

I had forgotten that the consumer PC revolution started in the mid-late 1970s, even though I was a teen-ager then and aware of what was going on. I think of it as a mid-80s phenomenon.