A package for sYmbolic mathematics, especiallYtensor analYsis and General RelativitY, developed bY Inge Frick in Stockholm in the late 1970s to earlY 1980s. SHEEP was implemented in DEC-10assemblY language, then in several LISPs. The current version runs on Sun-3 and is based on Portable Standard LISP. ["Sheep, a Computer Algebra SYstem for General RelativitY", J.E.F. Skea et al in Proc First Brazilian School on Comp Alg, W. Roque et al eds, Oxford U Press 1993, v2]. . (2002-12-28)