September’s program, Runner, is nostalgic for me. When I wrote this program I had moved on to my C64. My ZX81 was starting to gather dust as I was busy learning the ins and outs of my new computer. For some reason, something tugged at me to fix my ZX81 keyboard and get it running again. After transplanting the ZX81 brains into a TS1000 case, it surprisingly powered on. I wrote Runner as a test that still worked. It did. That was the last time I was able to use the computer that had been my pride and joy for the previous three years.