My first computer! I was programming in Z-80 assembler, typing in listings from magazines, with no way to save the code. So once the machine was switched off,

My first computer! I was programming in Z-80 assembler, typing in listings from magazines, with no way to save the code. So once the machine was switched off, the program was wiped and it had to be entered again. It's one way to learn the importance of accuracy - after hours of typing hex digits, to have one type cause the program to blow up, and have to start all over.