Package cmu 1.1 provides unification in a commutative monoid, also know as ACU-unification. The core computation finds the minimal non-zero solutions to homogeneous linear Diaphantine equations. The linear equation solver has been place in a separate module so it can be used for other applications Package agum 2.2 provides unification and matching in an Abelian group, also know as AG-unification and matching. The core computation finds the integer solutions to inhomogeneous linear equations. The linear equation solver has been place in a separate module so it can be used for other applications John