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GLOSSARY
SCSI-2 – The second generation of SCSI; includes many improvements to SCSI-1, including Fast
SCSI, Wide SCSI, and mandatory parity checking.
SCSI-3 – The third generation of SCSI; introduces Fast-20 and Fast-40 as
improvements to the parallel bus. The standard also includes a number of specifications for
high-speed serial bus architectures such as SSA, Fiber Channel, and IEEE 1394. Also known as
Ultra SCSI.
Ultra SCSI – Also known as SCSI-3, is a third generation SCSI standard that introduced parallel bus
speed improvements (FAST-20 and FAST-40), an the miniaturized 68-pin micro connector.
USB (Universal Serial Bus) – USB consolidates serial, parallel, keyboard, mouse, and game
ports into one asynchronous and isochronous communications port with bandwidth for data transfer
speeds up to 12 Mbps without termination. By daisy-chaining USB hubs, up to 127 I/O devices can
be connected to one USB port on the PC. USB is completely plug-and play meaning peripherals can
be correctly detected and configured automatically as soon as they are connected.
UTP (Unshielded Twisted Pair) – Twisted pair cable with neither individual nor overall shielding.
Twisted Pair are two wires twisted together to reduce susceptibility to RF crosswalk.
VGA (Video Graphics Array) – A video adapter that supports 640x480 pixels color resolution.
The Windows OS provides medium text & graphics standard.
VL-Bus – It is also known as Local Bus; this is an I/O interface that is directly connected and
depended of the system CPU. The VL-Bus is an abbreviation of VESA Local Bus.
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