LALR

from The Free On-line Dictionary of Computing (8 July 2008)

Look Ahead Left-to-right parse, Rightmost-derivation
LALR
Look ahead LR

   <parsing, algorithm> (LALR, Look ahead LR) A type of {LR
   parser} that can deal with more {context-free grammars} than
   {SLR parsers} but less than {LR[1]} parsers.  LALR parsers are
   popular because they give a good trade-off between the number
   of grammars they can deal with and the size of the parsing
   table required.  Compiler compilers like {yacc} and {Bison}
   generate LALR parsers.

   Wikipedia (http://wikipedia.org/wiki/LALR_parser).

   (2003-05-13)