1 Berkeley Yacc owes much to the unflagging efforts of Keith Bostic. 2His badgering kept me working on it long after I was ready to quit. 3 4 Berkeley Yacc owes much of its speed to Tom Pennello and Frank DeRemer. 5Their excellent algorithm for computing LALR(1) lookaheads, described in their 6almost impenetrable article in TOPLAS 4,4, lies at the core of Berkeley Yacc. 7 8 Finally, much of the credit for the latest version must go to those 9who pointed out deficiencies of my earlier releases. Among the more 10prolific contributors were 11 12 Benson I. Margulies 13 Dale Smith 14 Ozan Yigit 15 Dave Gentzel 16 John Campbell 17 Bill Sommerfeld 18 Paul Hilfinger 19 Gary Bridgewater 20 Dave Bakken 21 Dan Lanciani 22 Richard Sargent 23 Parag Patel 24