APL — a higher level language
A. N. Barrett, Alan Lindsay Mackay · 1987
APL (short for A Programming Language) was developed by K. Iverson from 1962, to be a computer language which would operate with multi-dimensional arrays as single symbols. It is one of the highest level languages generally available and matrix algebra is handled extremely concisely. APL is normally an interpreted language, where lines are executed in succession, and was designed to be used interactively. At first it was implemented on an IBM 360 system, and then on dedicated IBM minicomputers, but now it has reached a stage where it has been provided in a form whereby one can have a full system on a micro-computer at very low cost.