“The mystery program was my own, and I had no specific memory of writing it.”
A dot-matrix printout of a TRS-80 game written on New Year’s Day 1981 turned up inside an old magazine. Under 200 lines of BASIC, revived on an emulator forty years later. Google’s photo OCR finds buses and crosswalks fine and struggled with plain printed code. The hard part was not running a 1981 program. It was understanding what he wrote as a teenager.