Brings back memories. IIRC I got one of these with my Acorn Atom Kit. A kit ‘cause my dad wanted to teach me out to build it myself (or was it because he wanted to save money…?)
Must watch film: Micro men
It's about Sinclair and Acorn.
There is also a video of the Acorn founders reacting to Micro Men.
I really liked RISC OS. The Acorn machines were really fun.
RISC OS is still around and just got Wi-Fi. It'll run on some models of Raspberry Pi.
I guess this is from just before the Acorn Electron was released.
Apple bought Acorn and used them to make all their world changing devices. M series is just the latest.