Noun
a combat support agency in the Department of Defense responsible for developing and operating and supporting information systems to serve the needs of the President and the Secretary of Defense and the Joint Chiefs of Staff
Source: WordNetA leak at the Defense Information Systems Agency exposed personal information of government employees, including social security numbers. Source: Internet
Tell your Department of Defense employees not to download it, and wipe it if it’s already on their devices, the Defense Information Systems Agency recommended. Source: Internet