An API supporting portability for COTS users of real-time embedded multicomputers has been produced by a national forum of government, academia, and industry participants, known as the Vector Scalar Image Processing Library (VSIPL). VSIPL provides a type of computational middleware, which also supports interoperability with interprocessor communication (IPC) middleware such as MPI and MPI/RT. The VSIPL Forum has produced the API, a prototype reference library, and a test suite to verify API compliance. Commercial implementations will begin to become available during the late summer to early fall of 1999. Earnest consideration by various defense programs is underway and early adoption has begun. This paper introduces both program managers and engineers to VSIPL by providing an overview of the specification, walking through examples, and presenting an update of its status.