Sing, 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 . (2003-05-13)