CentralNotice Yacc From Wikipedia, the free encyclopedia Jump to: navigation , search This article includes a list of references , but its sources remain unclear because it has insufficient inline citations . Please help to improve this article by introducing more precise citations. (November 2012) Yacc is a computer program for the Unix operating system. The name is an acronym for " Yet Another Compiler Compiler ". It is a LALR parser generator , generating a parser , the part of a compiler that tries to make syntactic sense of the source code , specifically a LALR parser , based on an analytic grammar written in a notation similar to BNF . [ 1 ] It was originally developed in the early 1970s by Stephen C. Johnson at AT&T Corporation and written in the B programming language , but soon rewritten in C . [ 2 ] A full description of Yacc was published in 1975. [ ...