I wrote assembly language on IBM/360 in ACP (Airline Control Program) and TPF (Transaction Processing Facility) for KLM. It was fun. A totally different world.

I wrote assembly language on IBM/360 in ACP (Airline Control Program) and TPF (Transaction Processing Facility) for KLM. It was fun. A totally different world. My manager/mentor had worked with punch cards (phased out just before I came in) and was known to only get two errors on average in the nightly compile batches. (People could only compile once per day, and one program could be comprised of hundreds of card). Very impressive for assembly.