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 资深译员姚坚,国际知名语言学院法律翻译专业,擅长翻译各类与主权诉讼,仲裁及债务解决相关的法律文件。