ВУЗ:
Составители:
Рубрика:
54
4 Read the article, check you answers for Activity 3. Fill in gaps 1-6 with
the missing phrases A-G. One phrase needn’t to be used.
A competing operating systems
B capable of running the same software
C to put an entire CPU on one chip
D to form a networks
E to design electrical installations and lighting systems
F single-user systems
G computing power and graphics capability
PERSONAL COMPUTER
Personal computer is a small, relatively inexpensive
computer
designed for an individual user. In price,
personal computers range anywhere from a few
hundred dollars to thousands of dollars. All are
based on the microprocessor
technology that
enables manufacturers
1_______________. CPU stands for Central Processing Unit. The reason
the CPU is called a processor is because it can work with data: it can do
calculations; it can move data.
Businesses use personal computers for word processing
, accounting,
desktop publishing
, and for running spreadsheet and database management
applications. At home, the most popular use for personal computers is for
playing games. Personal computers first appeared in the late 1970s. One of the
first and most popular personal computers was the Apple II, introduced in 1977 by
Apple Computer
. During the late 1970s and early 1980s, new models and
2__________ appeared daily.
Then, in 1981, IBM
entered the market with its first personal computer,
known as the IBM PC
. The IBM PC quickly became the personal computer of
choice, and most other personal computer manufacturers fell by the wayside. One
of the few companies to survive IBM was Apple Computer, which remains a major
player in the personal computer marketplace.
Other companies adjusted to IBM's dominance by building IBM clones
,
computers that were internally almost the same as the IBM PC, but that cost less.
Because IBM clones used the same microprocessors as IBM PCs, they were
3________________. Over the years, IBM has lost much of its influence in
directing the evolution of PCs
.
Today, the world of personal computers is basically divided between Apple
Macintoshes and PCs. The principal characteristics of personal computers are
that they are 4__________ and are based on microprocessors. However,
although personal computers are designed as single-user systems, it is common
to link them together 5______. In terms of power, there is great variety. At the
high end, the distinction between personal computers and workstations
has
faded. High-end models of the Macintosh and PC offer the same 6________as
low-end workstations by Sun Microsystems, Hewlett-Packard
, and DEC.
(http://www.webopedia.com)
Страницы
- « первая
- ‹ предыдущая
- …
- 52
- 53
- 54
- 55
- 56
- …
- следующая ›
- последняя »
