called "Scientific XPL" for their ABLE series computers, used for laboratory automation, computer networking, and control of music synthesis hardware, starting in the mid-1970s Current status XPL continues to be ported to current computers. An x86/FreeBSD port was done in 2000, an x86/Linux port in 2015, and an XPL to C translator in 2017. Bibliography Alexander, W. G. and Wortman, D. B. "Static and Dynamic Charactersistics of XPL Programs." IEEE Computer November 1975; 41-46. Ancona, Massimo, Dodero, Gabriella, and Durante, Ercole Luigi "Cross software development for microprocessors using a translator writing system" Proceedings of the 4th International Conference on Software Engineering 1979: 399-402. Kamnitzer, S. H. "Bootstrapping XPL from IBM/360 to UNIVAC 1100." ACM SIGPLAN Notices May 1975: 14-20. Karger, Paul A. "An Implementation of XPL for Multics." SB thesis. Massachusetts Institute of Technology, 1972. Klumpp, Allan R. "Space Station Flight Software: Hal/S or Ada?" Computer March 1985: 20-28. Leach, Geoffrey and Golde, Helmut. "Bootstrapping XPL to an XDS Sigma 5 Computer." Software: Practice and Experience 3 (1973): 235-244. McKeeman, William M., Horning, James J. and Wortman, David B. A Compiler Generator. Englewood Cliffs, NJ: Prentice-Hall, 1970. McKeeman, W. M., Horning, James J., Nelson, E. C., and Wortman, D. B. "The XPL compiler generator system." AFIPS Conference Proceedings: 1968 Fall Joint Computer Conference. Washington DC: The Thompson Book Company. 1968: 617-635. Sitton, Gary A., Kendrick, Thomas A., and Carrick, Jr., A. Gil. "The PL/EXUS Language and Virtual Machine" Proceedings of the ACM-IEEE Symposium on High-level-language Computer Architecture Nov, 1973: 124-130. Slimick, John "Current Systems Implementation Languages: One User's View" Proceedings of the SIGPLAN symposium on Languages for system implementation Oct, 1971: 20-28. Storm, Mark W., and Polk, Jim A. "Usage of an XPL Based Compiler Generator System" Proceedings of the 14th annual ACM Southeast Regional Conference April 1976: 19-26. Wortman, D. B. "A roster of XPL implementations." ACM SIGPLAN Notices January 1978: 70-74. See also PL/M Notes References McKeeman, William Marshall; Horning, James J.; and Wortman, David B., A Compiler Generator (1971), . The definitive reference, including source code of all components of the XPL system. External links University of Toronto XPL Home Page The XPL Programming Language A Compiler Generator page at Amazon.com Scientific XPL for New England Digital Corporation's ABLE Series Computers PL/I programming language family Systems programming languages Procedural programming languages Structured programming languages Programming languages created in 1967 Programming languages