Back in 1963, my senior year in high school, I took a Saturday enrichment class at Columbia University: programming in Fortan for NASA's 7090 (or was it a '94?)

Back in 1963, my senior year in high school, I took a Saturday enrichment class at Columbia University: programming in Fortan for NASA's 7090 (or was it a '94?). Then in the spring, they launched a weather satellite, the week after I submitted my first assembly language program, which came back with my first bug (I think I had a period instead of a comma), and there wasn't any more machine time for high schoolers... Columbia also had a Bendix G-15 which had a head-per-track rotating drum for main memory: instructions were mostly 3-address: two operand addressses, and a next-instruction address, all from the current track. Much fun to try to lay out the instructions and data optimally.