If your as old as me, then you probably remember the Sinclair ZX81 from 1981, well one clever modder has used the case to make the ZX81 PC.
The ZX81 measure 6.6 inches wide x 1.6 inches tall x 6.9 inches deep, which is pretty small to fit a whole PC inside.
Unravelled used a tiny hard drive and a VIA EPIA Pico-ITX motherboard, to make cool PC mode, I am surprised he managed to get everything he needed to make the PC into the case.
Instead of making one PC, Unravelled decided to make two, a Linux and a Windows version.
Unravelled via Technabob