Always happy to talk about this stuff! Have you read any of the essays/papers/anecdotes on jsoftware.com yet? They expand a lot on the history of APL, and it's

Always happy to talk about this stuff! Have you read any of the essays/papers/anecdotes on jsoftware.com yet? They expand a lot on the history of APL, and it's pretty fascinating. A fun quote that highlights how many years ahead APL and the companies built around APL were/are even decades later: Working at IPSA, with its far-flung offices and its Mailbox, it was possible to “know” a person for years without ever meeting the person. Well into my IPSA career, I asked Lib Gibson, “Is Leslie Goldsmith a guy or a girl?” https://www.jsoftware.com/papers/APLQA.htm https://www.jsoftware.com/papers/APLQA.htm (IPSA was I.P. Sharp Associates, which long before that ran a huge amount of the APL in the world, remotely. Kind of like a primitive cloud, though then called time-sharing.)