Silicon Graphics O2+ Hardware Reference Manual page 238

Glossary
218
NFS (Network File System)
A networking software option that lets you access files and directories that reside on the
disks of other workstations as if they resided on a local disk in your own workstation.
NTSC
A color television standard or timing format that encodes all of the color, brightness, and
synchronizing information in one signal. Used in North America, most of South
America, and most of the Far East, this standard is named after the National Television
Systems Committee, the standardizing body that created the system in the United States
in 1953. NTSC uses a total of 525 horizontal lines per frame, with two fields per frame of
262.5 lines each. Each field refreshes at 60 Hz (actually 59.94 Hz).
open
To double-click an icon, or to select an icon, and then select Open from a menu in order
to display a window.
option drive
Any internal drive other than the system disk. Option drives include floppy disk drives,
floptical disk drives, secondary hard disk drives, and DAT drives.
outlets
Openings in the hardware to which you attach connectors to make an electrical
connection.
PAL
The acronym for Phase Alternation Line or Phase Alternated by Line, by which the
workstation attempts to correct some of the color inaccuracies in NTSC. PAL is a color
television standard or timing format developed in West Germany and used by most
other countries in Europe (including the United Kingdom but excluding France), as well
as Australia and parts of the Far East. PAL uses a total of 625 horizontal lines per frame,
with two fields per frame of 312.5 lines per field. Each field refreshes at 50 Hz. PAL color
encoding is different from NTSC encoding. See also NTSC.
PCI (Peripheral Component Interconnect)
A bus specification. The PCI bus is a high-performance local bus used to connect
peripherals to memory and a microprocessor. Many vendors sell devices that plug into
the PCI bus.
007-4486-001