Information Processing Language

Abstract: This tutorial on AWK is intended for readers who have a general familiarity with UNIX*, and who have at least a rudimentary knowledge of programming in some procedural language.AWK is an interpretive programming language, which makes it useful for prototyping. Primary applications of AWK are information retrieval, report writing, and data manipulation.AWK is often used as a special purpose information processing language - many of whose capabilities are easily accessible to non-programmers. We present it as a programming language - with added capabilities - particularly useful for rapid prototyping.

Abstract: Dartmouth project and would have learned of IPL-II there if not before. Herbert Stoyan (1956-1959) has In view of the current increasing interest in artificial intelligence, the importance of the work described by Simon and Newell cannot be overstated. They were participants in the Dartmouth Summer Research Project on Artificial Intelligence in 1956 and almost certainly spoke of IPL-II and its ability to operate on lists, which Jean Sammet (1969) refers to as “one of the most significant events that has ever occurred in programming. ‘I John McCarthy, Marvin Minsky, Nat Rochester, and Claude Shannon organized the Stoyan, Herbert. 1956-l 959. Ear/y LlSP History. University speculated on the effect of the Newell and Simon work

Abstract: : This Memorandum contains a highly detailed program listing for the Logic Theory Machine (LT), a computer program written in Information Processing Language-V (IPL-V), and developed especially for use as a pedagogical model. The text portions of the Memorandum expand upon the documentation in the listing, tracing program flow, analyzing routines utilized, and providing insight into the structure and the development of the program. LT was originally programmed in an early version of IPL by Newell, Shaw, and Simon to derive proofs of logic expressions in the sentential calculus of Whitehead and Russell. In rewriting the program for use as a teaching aid, a new method of replacement on subexpressions has been included, and many minor changes effecting improvements in clarity have been incorporated. Features of the code that were unjustifiably hard to explain have been simplified. The Memorandum defines LT's activity in terms of problem solving, and then a representation of the defined problem is given in terms of IPL-V. Finally, what LT does is discussed in terms of process hierarchies which operate on the lists structure representations of logic expressions. (Author)