The Sinclair ZX81: 30 years old today. Happy Birthday, old plastic box. I loved that thing and started some crazy projects on it. It started with 1 Kilobyte of memory, later with the great expansion to 16 Kilobytes - you couldn't hit the table too hard, otherwise the connections would wobble and the computer would reset. And the box even got me my first (and only) article in c't! After the ZX 81 came the ZX Spectrum with gigantic 48 Kilobytes of memory (from the money of the article). Then it got boring with PCs. It wasn't until the 90s that Macs came into my life.