Aravind Krishna Joshi (August 5, 1929 – December 31, 2017) was the Henry Salvatori Professor of Computer and Cognitive Science in the computer science department of the University of Pennsylvania.
Joshi defined the tree-adjoining grammar formalism which is often used in computational linguistics and natural language processing.
Joshi's graduate work was done in the electrical engineering department at the University of Pennsylvania, and he was awarded his PhD in 1960.
He became a professor at Penn and was the co-founder and co-director of the Institute for Research in Cognitive Science.
The Franklin Institute citation states that he was awarded the medal "for his fundamental contributions to our understanding of how language is represented in the mind, and for developing techniques that enable computers to process efficiently the wide range of human languages.