Dell Latitude D820 Technical Manual page 104

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Bluetooth wireless technology — A wireless technology standard for short-range (9 m [29 feet])
networking devices that allows for enabled devices to automatically recognize each other.
boot sequence — Specifies the order of the devices from which the computer attempts to boot.
bootable CD — A CD that you can use to start your computer. In case your hard drive is damaged or
your computer has a virus, ensure that you always have a bootable CD or floppy disk available. Your
Drivers and Utilities or ResourceCD is a bootable CD.
bootable disk — A disk that you can use to start your computer. In case your hard drive is damaged
or your computer has a virus, ensure that you always have a bootable CD or floppy disk available.
bps — bits per second — The standard unit for measuring data transmission speed.
BTU — British thermal unit — A measurement of heat output.
bus — A communication pathway between the components in your computer.
bus speed — The speed, given in MHz, that indicates how fast a bus can transfer information.
byte — The basic data unit used by your computer. A byte is usually equal to 8 bits.
C
C — Celsius — A temperature measurement scale where 0° is the freezing point and 100° is the
boiling point of water.
cache — A special high-speed storage mechanism which can be either a reserved section of main
memory or an independent high-speed storage device. The cache enhances the efficiency of many
processor operations.
L1 cache — Primary cache stored inside the processor.
L2 cache — Secondary cache which can either be external to the processor or incorporated into the
processor architecture.
carnet — An international customs document that facilitates temporary imports into foreign countries.
Also known as a merchandise passport.
CD — compact disc — An optical form of storage media, typically used for audio and software
programs.
CD drive — A drive that uses optical technology to read data from CDs.
CD player — The software used to play music CDs. The CD player displays a window with buttons
that you use to play a CD.
CD-R — CD recordable — A recordable version of a CD. Data can be recorded only once onto a CD-
R. Once recorded, the data cannot be erased or written over.
CD-RW — CD rewritable — A rewritable version of a CD. Data can be written to a CD-RW disc, and
then erased and written over (rewritten).