Poplog

Poplog is a reflective, incrementally compiled software development environment for the programming languages POP-11, Common Lisp, Prolog, and Standard ML, originally created in the UK for teaching and research in artificial intelligence at the University of Sussex.

After an incremental compiler for Prolog had been added to an implementation of POP-11, the name Poplog was adopted, to reflect the fact that it supported programming in both languages. The name was retained, as a trade mark of the University of Sussex, when the system was later extended as incremental compilers were added for Lisp and Standard ML.

For some time after 1983, Poplog was sold and supported internationally as a commercial product, by Systems Designers Ltd, whose name changed as ownership changed. The company, then EDS (now Hewlett Packard Enterprise Services) owned Poplog after EDS took over SD-Scicon, who owned Poplog until 1991. At that time a management buy-out produced a spin-off company Integral Solutions Ltd (ISL), to sell and support Poplog in collaboration with Sussex University, who retained the rights to the name 'Poplog' and were responsible for most of the software development while it was a commercial product.

ISL and its clients used Poplog for a number of development projects, especially their data-mining system Clementine, mostly implemented in POP-11, using powerful graphical tools implemented also in POP-11 running on the X Window System. Clementine was so successful that in 1998 ISL was bought by SPSS Inc who had been selling the statistics and data-mining package SPSS for which they needed a better graphical interface suited to expert and non-expert users. SPSS did not wish to sell and support Poplog as such, so Poplog then became available as open source software, hosted at the University of Birmingham, which had also been involved in development after 1991. Later IBM bought SPSS and Clementine is now marketed and supported as SPSS Modeler.

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