Back in the early 70s, I wrote software for the PDP11/20 (in ASM) to collect data from counters for accelerated particles. I recall handcrafting interrupt service routines to ensure they stayed ahead of the counters. And using paper tape to load the software after I hand-toggled the bootstrap loader.
For the next 15 years, I was an APL programmer, and later a Q/K developer. It would have been a hoot to use K was back in the 70s to analyze the collected data!
I noticed the iron ring on your pinkie -- Canadian engineer?