Microsoft Office Tutorials and References
In Depth Information
ESSENTIAL INTRODUCTION TO COMPUTERS
Computers are everywhere: at work, at school, and at home. In the workplace, employees
use computers to create correspondence such as e-mail, memos, and letters; calculate
payroll; track inventory; and generate invoices. At school, teachers use computers to assist
with classroom instruction. Students complete assignments and do research on computers. At
home, people spend hours of leisure time on the computer. They play games, communicate with
friends and relatives using e-mail, purchase goods online, chat in chat rooms, listen to music,
watch videos and movies, read books and magazines, research genealogy, compose music and
videos, retouch photographs, and plan vacations. At work, at school, and at home, computers are
helping people do their work faster, more accurately, and in some cases, in ways that previously
would not have been possible.
WHAT IS A COMPUTER?
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A computer is an electronic device, operating under the control of instructions stored in its own
memory, that can accept data (input), process the data according to specified rules (process),
produce results (output), and store the results (storage) for future use. Generally, the term is used to
describe a collection of hardware components that function together as a system. An example of
common hardware components that make up a personal computer is shown in Figure 1.
Common computer hardware components.
portable media player
PC video camera
hard disk drive
and storage devices)
external hard disk
USB flash drive