|Alma mater||Indian Institute of Technology, Kanpur|
|Institutions||Penn State University|
Ravi Sethi (born 1947) is an Indian computer scientist retired from Bell Labs and president of Avaya Labs Research. He also serves as a member of the National Science Foundation's Computer and Information Science and Engineering (CISE) Advisory Committee. He is best known as one of three authors of the classic computer science textbook Compilers: Principles, Techniques, and Tools, also known as the Dragon Book.
Sethi was born in 1947 in Murdana, Punjab. He attended the Indian Institute of Technology, Kanpur (IITK) and went on to obtain a Ph.D. at Princeton University. He worked as an assistant professor at Penn State University, before joining Bell Labs in 1976.
While working for Bell Labs he was awarded the "Distinguished Technical Staff award", and in 1996 he was named a Fellow of the Association for Computing Machinery. Also in 1996 he was named research vice president in charge of computing and mathematical sciences and, additionally, in 1997, chief technical officer for Lucent’s Communications Software Group.