COMMON ACCESS CARD
With The CAC, a "smart" card Access Cards are about the size of a credit card, is the standard identification for active-duty military personnel, Selected Reserve, DoD civilian employees, and eligible contractor personnel for their access. It is also the principal card used to enable physical access to buildings, offices and controlled spaces, and it provides access to defense computer networks and systems also whenever they use their access cards.
Card Types & Eligibility
These access cards you will be eligible for will be determined by your "Sponsor," the person affiliated with the DoD or other federal agency responsible for verifying and authorizing your need for an IDentity card. The uses of the access card depend on the component/Command that they support. Each component/Command can customize the CAC to meet its specific needs.