DoD Information Technology (IT) Portfolio Repository (DITPR) contains a comprehensive unclassified inventory of the DoD’s mission-critical and mission-essential Information technology systems and their interfaces. It contains basic overview information regarding all DoD IT systems, including; system names, acronyms, descriptions, sponsoring components, approval authority, points of contact, and other basic information required to analyze DoD inventory, portfolios, or capabilities. It supports the Title 40/Clinger-Cohen Act inventory requirements and the capital planning and investment processes of selection, control, and evaluation.
Definition: The DoD IT Portfolio Repository (DITPR) is a database directly updated by the Components and contains key information that catalogues the DoD business systems.
DoD Information Technology (IT) Portfolio Repository (DITPR) Website Info
The DITPR is web-enabled, requires a Common Access Card (CAC) to obtain access, and requires a user account approved by a DoD Component or DoD IT Portfolio Management (PfM) Mission Area or Domain Sponsor. A separate inventory on the Secret Internet Protocol Router Network (SIPRNET) called the DoD SIPRNET IT Registry requires a separate user account to obtain access. 
Website: DoD Information Technology (IT) Portfolio Repository (DITPR) (CAC Required)
DoD Information Technology (IT) Portfolio Repository (DITPR) System Information
Data is entered into the DITPR by one of two (2) means: 
- For the Army, Air Force, Navy & Marine Corps, and the TRICARE Management Activity; data is entered into the DoD Component’s IT inventory system and uploaded to DITPR by batch update monthly.
- All other Components work directly online in DITPR.
Who is Responsible? The Program Manager (PM) is responsible for ensuring the system is registered and should follow applicable DoD Component Chief Information Officer (CIO) procedures and guidelines. 
DITPR Update Procedure: The DITPR guidance outlines a standard, documented procedure for updating its contents monthly. The rules, procedures, and protocols for adding, deleting, and updating system information are available to users once registered. Service and Agency CIOs confirm the completeness of the inventory and the accuracy of the data on the inventory annually. 
DITR Ypdates for Decision Making: The Registry has recently expanded its support to decision-makers managing IT assets. Additional fields have been added to the Registry to support the Federal Information Systems Management Act and the Privacy Act. The Registry also supports the Comptroller’s Business Management Modernization Program by providing baseline data on mission-critical and mission-essential financial systems. Service and Agency CIOs determine adding or deleting mission-critical and essential systems based on mission needs and ongoing investment decisions.
AcqLinks and References:
-  Defense Acquisition Guidebook (DAG) – Chapter 7
- DoD Information Technology (IT) Portfolio Repository (DITPR) Navy Process Guide
- DoD Information Technology (IT) Portfolio Repository (DITPR) Users Guide (11MB)
- Website: DITPR (CAC Required)