My first programming language was APL. It's an amazing application of symbolic logic that can reduce a three-page BASIC program to three lines of code (split into three lines mostly for readability). Entire multi-million-dollar, multi-story computing centers were built around the hardware that was specially designed to run it (IBM's 360/370 series). One of the first portable comuters was built to run it.
How many people are programming in APL today?
APL !! I thought I was the only one left that ever used that. I started with APL, APL\360 actually on an IBM 360/40. Those were the days.