Comment on "An Optimal Evaluation of Boolean Expressions in an Online Query System." CACM October, 1979 Laird, P. Query, Boolean expression, information retrieval, file organization 3.53.70 3.73 3.74 CA791001 DB January 16, 1980 4:50 PM 3168 4 3168 3168 4 3168 3169 4 3168 2965 5 3168 3002 5 3168 3168 5 3168 3168 5 3168 3168 5 3168