A while back, someone here saw a book with good descriptions of YACC and name (author, IBSN#) of such a book? Thanks for the help! Nancy D. Ege UUCP: decvax!mcvax!zti1!nancy Bundespost: ZTI SOF 41 Siemens AG Otto-Hahn-Ring 6 8000 Munich 83 BRD (West Germany)