Defense Information Systems Agency

What Does Defense Information Systems Agency Mean?

The Defense Information Systems Agency (DISA) is a combat support agency that provides IT and communication support to all institutes and individuals working for the U.S. Department of Defense. DISA oversees the IT/technological aspect of organizing, delivering and managing defense-related information.


DISA was formerly known as the Defense Communications Agency (DCA).

Techopedia Explains Defense Information Systems Agency

DISA primarily serves as the IT and communications backbone for the defense institutes and its stakeholders. DISA provides and ensures command and control information sharing and globally accessible IT infrastructure for combat forces, political/defense leaders and other related/partner individuals and organizations. Some of DISA’s core services include:

  • Command and Control (C2): Provides military commanders, war personnel and equipment with the necessary information for mission-critical decision making.
  • Computing: Provides and manages computing infrastructure such as servers, networks, cloud computing, software and more.
  • Identity and Access Management (IAM): Ensures that only authorized individuals and organizations have access to sensitive information and resources.

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Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…