And, the APL interpreter/compiler was weird. if you typed an F followed by a backspace, followed by an L, it would merge those into an E, as if they were typed on top of each other, like a typewriter.
Makes sense because some special functions were meant to be expressed as a combination of symbols. Natural logarithm was ○, backspace, star ; circle was used for logarithms and star was used for both exponentiation and the constant e.
And, the APL interpreter/compiler was weird. if you typed an F followed by a backspace, followed by an L, it would merge those into an E, as if they were typed on top of each other, like a typewriter.