family members. Security in CHCS works by a number of mechanisms and includes the concept of least privilege. You are assigned the minimum needed for your work duties. This limits your access to sensitive data both protected by the Privacy Act 1974 and PHI protected under HIPAA. AdHoc reports can be written using the FileMan tools and can be quite powerful if the files are designed with that in mind. Many CHCS files are now more easily accessed with MUMPS routines that can make more efficient use of the internal data structures. More information about FileMan can be found at www.hardhats.org. CHCS, which now runs on InterSystems Caché with the MUMPS globals being converted into Caché objects and the MUMPS routines accessing them, now can be accessed with .NET tools to query the Caché database. Many facilities have developed special queries of CHCS or new tools to facilitate workflow and processes. One such tool is an intranet web application to facilitate printing of lab specimen labels to special printers with formats not possible with the regular CHCS print devices and label printing methods. CITPO (now known as Defense Health Information Management Systems (DHIMS)) began the implementation of AHLTA, the DoD's Electronic Health Record (EHR) system, in January 2004. The system links the 481 Military Treatment Facilities (MTF) worldwide as well as service members deployed abroad to the EHR, ultimately supporting 9.2 million MHS beneficiaries. The introduction of AHLTA, previously known as the Composite Health Care System II, ushered in a significant new era in health care for the MHS and the nation. AHLTA Version 3.3.3.X with client update 9.1 currently fielded to physician and clinic staff workstations. DHIMS also manages the AHLTA-Theater program that provides EHR capabilities to deployed users with important store and forward capabilities when communications are unavailable. AHLTA and a significant portion of CHCS are slated to be replaced by a VA/DoD interagency iEHR program. The iEHR will bring together the strong Health IT resources of both the VA and the DoD to acquire the next generation EHR capabilities for both departments. Record Duplication As with all large hospital information systems, there are occasions that despite training and best intentions, duplicate patient records are created. CHCS has a function to merge patients, but not to unmerge. AHLTA also has merges performed on patients in its Oracle database and successful attempts are made to un-merge patients and their