'''Information Processing Language''' (IPL) was a [[programming language]] developed by [[Allen Newell]], [[Cliff Shaw]] and [[Herbert Simon]] at [[RAND Corporation]] and the [[Carnegie Institute of Technology]] from about [[1956]]. It included features intended to support programs that could perform general problem solving, including lists, associations, schemas (frames), dynamic memory allocation, data types, recursion, associative retrieval, functions as arguments, generators (streams), and [[cooperative multitasking]]. Newell had the role of language specifier/application programmer, Shaw was the system programmer and Simon took the role of application programmer/user.
IPL was used to implement twoseveral of the firstearly [[artificial intelligence]] programs, also by the same authors: the [[Logic Theory Machine]] (1956) and, the [[General Problem Solver]] (1957), and also their [[computer chess]] program [[NSS]] (1958).
