Editing Poplog (section)

==History==
After an [[incremental compiler]] for [[Prolog]] had been added to an implementation of [[POP-11]], the name POPLOG was adopted, to reflect that the expanded system supported programming in both languages. The name was retained, as a trade mark of the [[University of Sussex]], when the system was later (mid 1980s) extended with incremental compilers for [[Common Lisp]] and [[Standard ML]] based on a set of tools for implementing new languages in the Poplog Virtual Machine.<ref>{{cite book |last1=Smith |first1=Robert |last2=Sloman |first2=Aaron |last3=Gibson |first3=John |date=1992 |chapter=Poplog's two-level virtual machine support for interactive languages |chapter-url=http://www.cs.bham.ac.uk/research/projects/cogaff/10.html#1005 |editor1-last=Sleeman |editor1-first=D. |editor2-last=Bernsen |editor2-first=N. |title=Research Directions in Cognitive Science Volume 5: Artificial Intelligence |publisher=Lawrence Erlbaum Associates |pages=203–231}}</ref> The user-accessible incremental-compiler tools that allow compilers for all these languages to be added also allow extensions to be made within a language to provide new abilities that cannot be added via standard macros that merely allow new text to be equivalent to a longer portion of old text.

For some time after 1983,{{Vague|date=May 2025}} Poplog was sold and supported internationally as a commercial product, on behalf of the University of Sussex by Systems Designers Ltd (SDL), whose name changed as ownership changed. The main development work continued to be done by a small team at Sussex University until 1998, while marketing, sales, and support (except for UK academic users, who dealt directly with the Sussex team) was done by SDL and its successors (SD, then SD-Scicon then [[Electronic Data Systems]] (EDS)<ref>{{Cite news |date=17 August 1991 |url=https://www.nytimes.com/1991/08/17/business/company-news-electronic-data-wins-in-offer-for-sd-scicon.html |title=Company News: Electronic Data Wins in Offer for SD-Scicon |work=The New York Times}}</ref>) 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 the core software development while it was a commercial product. In 1992 ISL and Sussex University won a "Smart Award" in recognition of Poplog sales worth $5M.<ref>{{Cite web| title=ICP Million Dollar Awards | url=http://www.cs.bham.ac.uk/research/projects/poplog/figs/jpg/smart-poplog-5million.jpg | archive-url=https://web.archive.org/web/20130317010810/http://www.cs.bham.ac.uk/research/projects/poplog/figs/jpg/smart-poplog-5million.jpg | archive-date=2013-03-17}}</ref>
ISL and its clients used Poplog for many development projects, especially ISL's 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 [http://www.spss.com/ 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 a free [[Open-source software|open source]] software package,<ref>[http://www.cs.bham.ac.uk/research/projects/poplog/freepoplog.html The Free Poplog Portal]</ref> 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]].<ref>[http://www.cs.bham.ac.uk/research/projects/poplog/isl-docs/1999-AISBQ-TheStoryofClementine.pdf Khabaza, Tom. (1999). The Story of Clementine]</ref>