The DoD Modeling and Simulation Glossary (formally known as DoD 5000.59-M), was originally created in 1998. Currently (as of October 2010) the glossary is in the process of being updated to include up to date information. The update to the glossary does not change the main objective to provide a uniform language for use by the M&S community. It now simply consists of a relevant, up to date, accurate set of terms. This article contains a list of terms and acronyms, based on the original DoD 5000.59-M but also provides information related to its current update.