Uninterruptible Power Supply (UPS): A device that provides continuous electrical power, usually by storing excess capacity in one or more batteries.
USA PATRIOT Act: A U.S. law that expands the authority of law enforcement agencies for the purpose of combating terrorism.
User: A person who has access to information and/or information systems.
User Datagram Protocol (UDP): A network protocol that doesn’t guarantee packet delivery or the order of packet delivery over a network.
User Entitlement: The data access privileges that are granted to an individual user.
User mode: A level privilege, usually intended for ordinary users.