My very first PC was a Radio Shack TRS-80 sometime around upper 70s/1980. (TRS - Tandy Radio Shack)
Zilog Z80 processor at 1.77 megahertz
RAM 4KB
Black and white monitor
In the summer of 1977, Radio Shack introduced the TRS-80 for $599. This offering included a BASIC language interpreter, four kilobytes of RAM, a Zilog Z80 processor at 1.77 megahertz, a twelve-inch video monitor, a cassette recorder, a power supply, and a cassette tape containing the games Blackjack and Backgammon.
It was a beast!