PLaSM is a "geometry-oriented extension of a subset of the FL language"2 first described in 1992.
Aiken, Alexander; Williams, John H.; Wimmers, Edward L. "The FL Project: Design of a Functional Language" (PDF). Stanford University. http://theory.stanford.edu/~aiken/publications/trs/FLProject.pdf ↩
"Introduction to FL and PLaSM". plasm.net. http://www.plasm.net/docs/tutorial/introduction_to_fl_and_plas.html ↩