defense information systems agencyglossary / DEFENSE INFORMATION SYSTEMS AGENCY Defense Information Systems Agency. An agency in the U.S. Department of Defense responsible for developing and operating information systems to provide combat support for the armed forces. — Abbr. DISA. 词条贡献者 资深译员Bryan,毕业于美国一流的翻译学院,专注翻译各种与贸易与海关有关的法律文件。