<mathematics, tool> An early symbolic mathematics system,
written in Fortran by G.E. Collins.
[Proc 2nd Symp Symb Alg Manip pp.144-152 (1971)].
(1995-04-12)
sac
(sacs)
A sac is a small part of an animal's body, shaped like a little bag. It contains air, liquid, or some other substance.