It’s now 25 years ago that Windows 95 was launched, the operating system that gave the majority of 1990s PC users their first taste of a desktop-based GUI and a 32-bit operating system.

There isn’t much data about Volscan, but it appears to have been before its time, and had arguably the first GUI on a computer system ever. The Air Force had a problem. The new — in the 1950s ...