The MIT Enterprise Architecture Guide (EAG) documents MIT's architectural principles and goals, the current state of MIT's enterprise architecture, and a future state architectural vision. The EAG also includes information regarding the ITAG architecture review process. Since this document serves to inform developers about available enterprise tools and services, we expect the EAG will be useful to enterprise system developers across the institute. Because this is a constantly evolving document, community feedback will drive fut ure ITAG agendas and thus influence content in future versions. ITAG expects to update the EAG on a quarterly basis ure ITAG agendas and thus influence content in future versions. ITAG expects to update the EAG on a quarterly basis