Glossary
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and parallel ports. USB can connect computer peripherals such as
mice, keyboards, digital cameras, printers, personal media
players, flash drives, and external hard drives.
UTC Universal Time, Coordinated. The International Atomic Time (TAI)
with leap seconds added at irregular intervals to compensate for
the Earth’s slowing rotation. Leap seconds are used to allow UTC
to closely track UT1, which is mean solar time at the Royal
Observatory, Greenwich.
W
WRU Who are you? A command used in a telex message to request an
answer-back string (DE) from the recipient of the telex message.
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