Which were then followed by the BBC Model B+ (64 and 128), which was and improved model of the original BBC B.W. H. Heydt wrote:The Model A and Model B are a reference to the BBC Micro models.
I think you're reading more into the board designations than is really justified. I would take "2" simply to be "second generation", since the Pi2B is really a B+ with a better SoC and more RAM, even if the RAM has been moved from PoP to the other side of the board.jackokring wrote:+, compute or 2 means more GPIO.
compute means needs a lot of skill to use, but cheap on mass.
2 means quad core, NEON, more memory and hence faster.
B means network cable and more USB ports.
zero means small in need of connectors.
B has more memory than A (usually).