Information Processing Language is an early programming language developed for symbolic computation and artificial intelligence research. It was used to represent and manipulate lists, symbols, and problem-solving structures in early AI systems.
A programming language that includes features intended to help with programs that perform simple problem solving actions such as lists, dynamic memory allocation, data types, recursion, functions as arguments, generators, and cooperative multitasking. IPL invented the concept of list processing, albeit in an assembly-language style.