Declassification Mission Application Server (DMAS) is a collection of applications that support the department's classification mission. Applications include the electronic Document Review System, electronic Publication system, electronic Classification Guidance System, OpenNet, Tracking and Distribution System and the Reference Library System.

[Applications include the Authorities and Training Tracking System (ATTS) which contains training records for individuals who have attended classification training courses and those individuals who have been granted official authorities such as Authorized Derivative Classifiers and Authorized Derivative De-classifiers , Executive Order Review System (EOReview) which contains information for tracking reviews of classified documents, Guidance Distribution Tracking System (GDTS) contains information used to distribute classification guidance, and Policy Reference Library System (PRL) is a reference library of scanned documents relevent to classification policy.]