A+ is an
array programming language descendent from the programming language A, which in turn was created to replace
APL in 1988.
Arthur Whitney developed the "A" portion of A+, while other developers at
Morgan Stanley extended it, adding a graphical user interface and other language features. A+ was designed for numerically intensive applications, especially those found in financial applications. A+ runs on many
Unix variants, including
Linux. A+ is a high-level, interactive,
interpreted language.