Topic: Programming
NC demo system (1997)

A thin client-based slide show system for advertising displays.
Acorn World (1998)

The website for a show that never was.
BBC Micro (model B)

Much-beloved computer used in British schools back in the day. Many people of a certain age will remember this as the computer responsible for getting them in to computing.
Acorn Electron

The Electron, the first computer I ever owned.
Raspberry Pi display system

Putting this in the coding section might be a stretch...