'''Programming Language Design and Implementation''' ('''PLDI)''') is the name of the [[Association_for_Computing_Machinery|ACM]] [[SIGPLAN]] most important conference. The precursor of PLDI was the ''Symposium on Compiler Optimization'', held July 27-28, [[1970]] at the [[University of Illinois at Urbana-Champaign]] and chaired by [[Robert S. Northcote]]. That conference included papers by [[Frances E. Allen]], [[John Cocke]], [[Alfred V. Aho]], [[Ravi Sethi]], [[Jeffrey Ullman|Jeffrey D. Ullman]]. The first conference in the current PLDI series took place in [[1979]] under the name ''SIGPLAN Symposium on Compiler Construction'' in [[Denver|Denver, Colorado]]. The next Compiler Construction conference took place in [[1982]] in [[Boston, Massachusetts]]. The Compiler Construction conferences then alternated with SIGPLAN Conferences on Language Issues until [[1988]], when the conference was renamed to PLDI. From [[1982]] until [[2001]], the conference acronym was SIGPLAN 'xx. Starting in [[2002]], the acronym became PLDI 'xx, and in [[2006]] PLDI xxxx.
