GNU Bison parser generator

GNU Bison is a general-purpose parser generator that converts an annotated context-free grammar into a deterministic LR or generalized LR (GLR) parser. It was originally developed as a free software replacement for the Unix 'yacc' utility. Since its inception in the mid-1980s, Bison has become a fundamental tool in the world of computer science, specifically for developers building compilers, interpreters, and domain-specific languages.

As a flagship project of the GNU Project, Bison is developed by a global community of contributors under the stewardship of the Free Software Foundation (FSF). It is commonly found pre-installed on Linux distributions and is a critical component of the GNU toolchain. While its roots are in the United States via the FSF, its 'manufacturing' or coding occurs wherever its decentralized community of open-source developers resides.