The primary focus of attention in this paper is the representation of arbitrary endomorphisms
of a module as the sum of a fixed number of automorphisms. Our first focus is on
linear transformations of vector spaces of arbitrary dimension. The result (Theorem 2.5)
that, with one exception, every such transformation is the sum of two automorphisms
can hardly be new but we have been unable to find any reference to it in the literature.
It is worth remarking that the proof is constructive with an explicit algorithm for the
construction of the automorphisms being given. In the remainder of the paper we exploit
this result on vector spaces to derive similar results for a wider class of modules.