The Purdue Compiler-Compiler Tool Set (PCCTS) is a set of public domain software tools designed to facilitate the implementation of compilers and other translation systems. These tools currently include antlr, dlg and support code. In many ways, PCCTS is similar to a highly integrated version of YACC and LEX; where antlr (ANother Tool for Language Recognition) corresponds to YACC and dlg (DFA-based Lexical analyzer Generator) functions like LEX. However, PCCTS has many additional features which make it easier to use for a wider range of translation problems.