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UDP :
(User Datagram Protocol) One of the protocols for data
transfer that is part of the TCP/IP suite of protocols.
UDP is a "stateless" protocol in that UDP makes no provision
for acknowledgement of packets received.
Unix :
A family of operating systems known for its relative hardware
independence and portable applications interface. This
time-sharing operating systems is available on all AT&T
computers, and is widely used in technical and scientific
computing applications. It has recently made great strides in
entering mainstream commercial computing. Unix System V is the
version of Unix supported by AT&T and its user group, Unix
International.
Upload :
Transferring data (usually a file) from a the computer you are
using to another computer. The opposite of download.
UPS :
Uninterrupted Power Supply. Battery fed unit which supplies
electricity to the computer in case of mains failure.
URI :
(Uniform Resource Identifier) An address for s resource
available on the Internet.
The first part of a URI is called the "scheme". the most well
known scheme is http, but there are many others. Each
URI scheme has its own format for how a URI should appear.
Here are examples of URIs using
the http, telnet, and news schemes:
http://www.discoverscs.com ,
telnet://well.sf.ca.us,
news:new.newusers.questions.com
URL :
(Uniform Resource Locator) The term URL is basically
synonymous with URI. URI has replaced URL in technical
specifications.
URN :
(Uniform Resource Name) A URI that is supposed to be
available for along time. For an address to be a URN some
institution is supposed to make a commitment to keep the
resource available at that address.
USENET :
A world-wide system of discussion groups, with comments passed
among hundreds of thousands of machines. Not all USENET
machines are on the Internet. USENET is completely
decentralized, with over 10,000 discussion areas, called
newsgroups.
USL :
Unix System Laboratories. USL, which develops and markets the
Unix System V operating system, the Tuxedo Enterprise
Transaction Processing System and other standards-based system
software products, started in 1991 as a subsidiary spun off
from AT&T. Novell acquired USL in December 1992, partially as
a counter to Microsoft and its Windows products. The
announcement virtually set the stage for the next-generation
operating system war. Novell, which is likely to better
integrate NetWare servers with Unix, seeks to achieve three
goals: expand its market share, reduce its losses to Windows
NT, and accelerate the expansion of Unix, the low-end
commercial market.
UTP :
Unshielded Twisted Pair.
It is guaranteed by AT&T not only for speed capacity but also
for application usage. Easy to mount and rather cheap,
insensible to electromagnetic disturbances, it is able to
sustain 100 Mbps speed on distance less than 100 meters.
UUENCODE :
(Unix to Unix Encoding) A method for converting files from
Binary to ASCII (text) so that they can be sent
across the Internet via email. |
