Web Definitions
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T-1
A dedicated phone connection. T-1 lines are a popular leased
line option for businesses connecting to the Internet and for Internet
Service Providers (ISPs) connecting to the Internet backbone. The
Internet backbone itself consists of faster T-3 connections. T-1
lines are sometimes referred to as DS1 lines.
T-3
A dedicated phone connection used mainly by Internet Service
Providers (ISPs) connecting to the Internet backbone and for the
backbone itself.
UNIX
Pronounced yoo-niks, a popular multi-user, multitasking operating
system developed at Bell Labs in the early 1970s. Created by just
a handful of programmers, UNIX was designed to be a small, flexible
system used exclusively by programmers.
UNIX was one of the first operating systems to be written in a high-level programming language, namely C. This meant that it could be installed on virtually any computer for which a C compiler existed. This natural portability combined with its low price made it a popular choice among universities. (It was inexpensive because antitrust regulations prohibited Bell Labs from marketing it as a full-scale product.)
Bell Labs distributed the operating system in its source language form, so anyone who obtained a copy could modify and customize it for his own purposes. By the end of the 1970s, dozens of different versions of UNIX were running at various sites.
After its breakup in 1982, AT&T began to market UNIX in earnest. It also began the long and difficult process of defining a standard version of UNIX.
Due to its portability, flexibility, and power, UNIX has become a leading operating system for workstations. Historically, it has been less popular in the personal computer market.
Today, the trademarked "Unix" and the "Single UNIX Specification" interface are owned by The Open Group. An operating system that is certified by The Open Group to use the UNIX trademark conforms to the Single UNIX Specification.
According to The Open Group's Web site, "As the owner of the UNIX
trademark, The Open Group has separated the UNIX trademark from
any actual code stream itself, thus allowing multiple implementations.
Since the introduction of the Single UNIX Specification, there has
been a single, open, consensus specification that defines the requirements
for a conformant UNIX system. There is also a mark, or brand, that
is used to identify those products that have been certified as conforming
to the Single UNIX Specification, initially UNIX 93, followed subsequently
by UNIX 95, UNIX 98 and now UNIX 03. Both the specification and
the UNIX trade mark are managed and held in trust for the industry
by The Open Group."
View Source
In database management systems, a view is a particular way
of looking at a database. A single database can support numerous
different views. Typically, a view arranges the records in some
order and makes only certain fields visible. Note that different
views do not affect the physical organization of the database.
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