  We review the various contexts in which quantized 2-plectic manifolds are
expected to appear within closed string theory and M-theory. We then discuss
how the quantization of a 2-plectic manifold can be reduced to ordinary
quantization of its loop space, which is a symplectic manifold. We demonstrate
how the latter can be quantized using groupoids. After reviewing the necessary
background, we present the groupoid quantization of the loop space of R^3 in
some detail.
