The Programming Language Design and Implementation (PLDI) conference is an annual computer science conference organized by the Association for Computing Machinery (ACM) which focuses on the study of algorithms, programming languages and compilers.
It is sponsored by the SIGPLAN special interest group on programming languages.
[1] 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, and 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, Colorado.