Jacob Theodore "Jack" Schwartz (January 9, 1930 – March 2, 2009)[1] was an American mathematician, computer scientist, and professor of computer science at the New York University Courant Institute of Mathematical Sciences.

He was the designer of the SETL programming language and started the NYU Ultracomputer project.

[2] Schwartz's research interests included the theory of linear operators, von Neumann algebras, quantum field theory, time-sharing, parallel computing, programming language design and implementation, robotics, set-theoretic approaches in computational logic, proof and program verification systems; multimedia authoring tools; experimental studies of visual perception; multimedia and other high-level software techniques for analysis and visualization of bioinformatic data.

He also served as chairman of the Computer Science Board of the National Research Council and was the former chairman of the National Science Foundation Advisory Committee for Information, Robotics and Intelligent Systems.

From 1986 to 1989, he was the director of DARPA's Information Science and Technology Office (DARPA/ISTO) in Arlington, Virginia.