ETRI RWTH Aachen University RWTH Aachen University Huawei Technologies Duesseldorf GmbH Concordia University InterDigital Communications, LLC University College London University College London The term Computing in the Network (COIN) is used for a diverse set of scenarios. Often associated with leveraging richer computing capabilities within network elements, its clear scope is yet unknown. This document tries to bring clarity to the current understanding of COIN by providing an overview of the terminology and definitions to streamline corresponding discussions.