S, tool> A package for Symbolic mathematicS, eSpecially tenSor 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)
