Chapter 1 - What is a Computer

orangesvetElectronics - Devices

Nov 8, 2013 (4 years and 1 day ago)

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Chapter 1
-

What is a Computer

Types of Computers


Personal Computer



Mainframe Computer



Supercomputer

Personal Computer


Small computer


used by one person at a
time


Do few jobs at one time


Used at home, school, or on the job


Linked together


allows two or more people
to use same information

Mainframe Computer


Very Large computer


Big as a refrigerator


Used by many people at same time


Stores huge amounts of information


Can do many jobs at the same time

Supercomputer


Very fast mainframe computer


Used to do jobs at fastest speed


Can do millions of math operations


Very Expensive


Governments, big businesses and universities
use supercomputers

Using Computers


Personal Computers


In school


Computerized test


Computerized reports


At home /work


write letters


Play video games


Shopping chatting


Work, people send e
-
mail


Using Computers
(cont.)


Mainframes


Telephone companies


TV Studios


Transportation


Banks


Supermarkets Electric companies

Using Computers
(cont.)


Supercomputer


Weather forecasters


Air traffic controllers


NASA


Researchers


Artists


Sportscasters

THE ENIAC


First electronic computers


ENAIC
-
E
lectronic
N
umerical
I
ntegrator
a
nd
C
omputers


Larger than today’s computer


40 separate units


Weight


Information


Adding


Time to solve problems


Number built


Years worked


Why do you think ENIAC was so much
larger than computers are today?

Lesson Review

1.
How is a PC different from a mainframe?
How are they alike?

2.
Name at least five ways computers play a
part in your life everyday.

3.
CRITICAL THINKING
What type of computer
would be the best choice for the home?
Explain your answer.