U
unattended installation

An installation method that does not require human intervention once started and is frequently used when installing over the network. Unattended installations use answer files to supply the necessary parameters to Windows Setup.

uninterruptible power supply (UPS)

A UPS is designed to protect everything that's plugged into it from power surges, power sags, and even power outages. The device contains one or more batteries and fuses. Energy is stored in the batteries, and if the power fails, the batteries can power the computer for a period of time so the administrator can then safely power it down.

universal data connector (UDC)

Another name for an IBM data connector.

unshielded twisted-pair (UTP)

Networking cable ...

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