The dramatisation "Micro Men" https://en.wikipedia.org/wiki/Micro_Men covers some of the early history here, including the super-rapid creation of the BBC Micro and a cameo by Sophie Wilson.
Risc OS was roughly contemporary with Windows 3.0 and Apple's system 7, offering a cheaper and seemingly faster system (although rather idiosyncratic in its use of the mouse menubutton and drag-and-drop instead of save dialogs). It booted from ROM in something like a second.
Micro Men is available on youtube [1] and is definitely worth a watch. The scene were one of the characters is eating noodles using multimeter probes as chopsticks made me smile.
You may struggle to find Sophie in that film because at that time she was a man, and was Roger with the long hair (if I recall correctly).
Very informative programme, some funny scenes with Sinclair driving past in his C5.
I still love my Beeb, great machines. Very well written manuals too!
Risc OS was roughly contemporary with Windows 3.0 and Apple's system 7, offering a cheaper and seemingly faster system (although rather idiosyncratic in its use of the mouse menubutton and drag-and-drop instead of save dialogs). It booted from ROM in something like a second.