SIGPLAN is the Association for Computing Machinery's Special Interest Group (SIG) on programming languages.
This SIG explores programming language concepts and tools, focusing on design, implementation, practice, and theory.
Its members are programming language developers, educators, implementers, researchers, theoreticians, and users.
Given to an institution or individual(s) to recognize the development of a software system that has had a significant impact on programming language research, implementations, and tools.
It is "presented annually to the author of the outstanding doctoral dissertation in the area of Programming Languages.