The APL Programming Language Source Code

Thousands of programming languages were invented in the first 50 years of the age of computing. Many of them were similar, and many followed a traditional, evolutionary path from their predecessors. What eventually became APL was first a mathematical notation, not as a computer programming language.

CHM
At my very first professional EE position, in 1978, there was an older staff member, PhD, kind of a professor type, who was programming in APL. Naturally curious, I asked him about it and what the strange symbols on the keyboard meant. His explanation mostly flew right over my head but I asked a few questions, thanked him, and went away. In 43 years, he's the only person I ever saw using it.

I've always been curious about APL. My grandfather partnered with an APL programmer in the early 70's to develop shallow geodesic dome geometries suitable for home construction and optimized for least number of distinct strut lengths. The one he lived in is still standing[0]

[0] https://maps.app.goo.gl/YgExrSKh3UZu4XKw9

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