Here’s the description of the video:
Alex van Someren talks about his work at Acorn, which began while he was still a schoolboy! He also talk about starting up his own company which developed add-ons and upgrades for Archimedes and RISC PC machines. Back in the day, Alex helped deliver the BBC Microcomputer and Electron at Acorn, and co-wrote the first book on the ARM RISC architecture, also available pirated in Japanese!
Filmed at Acorn World at The Centre for Computing History 2019.