***** Work in progress ***** Paul McJones [email protected] https://mcjones.org/dustydecks Last modified 10 September 2026 Abstract John Backus explored a sequence of applicative, functional and function-level languages starting as early as 1969 and continuing until he retired in 1991. The goal of this web site is to archive the available materials from this research and put them into context. Comments, suggestions, and donations of additional materials are greatly appreciated. How to cite this page: Paul McJones. History of John Backus's functional programming project. Web site, Software Preservation Group, Computer History Museum. Last visited dd mmm yyyy.…