The purpose of the present document is to identify specialist technical terms used within the ETSI TC M2M for the purposes of specifying the M2M system. The motivations for this are: ? To ensure that editors use terminology that is consistent across specifications. ? To provide a reader with convenient reference for technical terms that are used across multiple documents. ? To prevent inconsistent use of terminology across documents. The present document is a collection of terms@ definitions and abbreviations contained in the baseline documents of the ETSI TC M2M framework. The present document provides a tool for further work on ETSI TC M2M technical documentation and facilitates their understanding. The terms@ definitions and abbreviations as given in the present document are either imported from existing documentation (ETSI@ 3GPP@ ITU or elsewhere) or newly created by the ETSI TC M2M experts whenever the need for precise vocabulary was identified.