It has been a long time since I used APL (in college)

We had APL terminals which had APL keys and would print APL characters. It was significantly more immersive that way.

Looking at this letter i start to vaguely recall things.

Decades later, I recall the output operator, not shown anywhere here.

⎕←<something>

which would print whatever <something> was. (was I misremembering?)

I do recall using matrix operations in a similar way to the math classes I was taking at the same time. matrix multiplication, inversion, dot products seemed to be more "math oriented" than other computer languages.

In other computer languages, you had to adapt to the language. For example:

  x = x + 1

  y = mx + b

in these two statements, one only makes sense in math class, one only makes sense to increment a variable in a computer language.