139770Sbostic Berkeley Yacc owes much to the unflagging efforts of Keith Bostic. 239770SbosticHis badgering kept me working on it long after I was ready to quit. 339770Sbostic 440085Sbostic Berkeley Yacc is based on the excellent algorithm for computing LALR(1) 540085Sbosticlookaheads developed by Tom Pennello and Frank DeRemer. The algorithm is 640085Sbosticdescribed in their almost impenetrable article in TOPLAS 4,4. 739770Sbostic 839770Sbostic Finally, much of the credit for the latest version must go to those 940085Sbosticwho pointed out deficiencies of my earlier releases. Among the most 1039770Sbosticprolific contributors were 1139770Sbostic 1239770Sbostic Benson I. Margulies 1340085Sbostic Dave Gentzel 14*46058Scorbett Antoine Verheijen 1540085Sbostic Peter S. Housel 1639770Sbostic Dale Smith 1739770Sbostic Ozan Yigit 1839770Sbostic John Campbell 1939770Sbostic Bill Sommerfeld 2039770Sbostic Paul Hilfinger 2139770Sbostic Gary Bridgewater 2239770Sbostic Dave Bakken 2339770Sbostic Dan Lanciani 2439770Sbostic Richard Sargent 2539770Sbostic Parag Patel 26