But he also invented the ZX81, with its whole 16k of extended ram.My first pocket calculator was a Sinclair something or other, it wasn't much better than a slide rule as it was so primitive I had to keep a mental note of where the decimal point was. I think it operated on a Polish Notation system. Sinclair went on to invent the Sinclair C5, another not very successful venture.
Fond memories as a kid…