Pattern matching code, unifiers, regular expression matchers.

lang/lisp/code/match/

   matcher/   Matcher: Regular expression style pattern 
              matcher.
   miranda/   Select Match
   nregex/    NREGEX: Lisp-based regular expression parser.
   regexp/    RegExp: Lisp interface to a C regular expression 
              search package.
   unifier/   Unifier: Interlisp and Common Lisp unification 
              code.
   unify/     UNIFY: Portable recursive and iterative 
              unification implementations.