LPS is a logic-based programming language and production system developed by Robert Kowalski and Fariba Sadri at Imperial College London.
For more information about LPS, see http://lps.doc.ic.ac.uk/.
To use this language package in Atom, open Settings > Install, then search for "language-lps".
Alternatively, you also install the package using command line via apm:
$ apm install language-lps
Contributions in the form of Issues and PRs are very much welcome. Package is licensed under the MIT License.