1. Introduction to computer
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2. What Is a Computer?
How is a computer defined?

Electronic device operating under the control of
instructions stored in its own memory
The computer
first, Accepts data such as raw facts, figures, and symbol
then, Processes data into information (Data that is
organized, meaningful, and useful )
finally, Produces and stores results
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3. What is the information processing cycle?
Input
Process
Output
Storage
Communication
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4. The Components of a Computer
What is an _____ device?
input

Hardware used
to enter data
and instructions
4

5. The Components of a Computer
What is an ______ device?
output

Hardware that
conveys
information
to a user
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6. The Components of a Computer
What is the system unit?

Box-like case
containing
electronic
components
used to process
data
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7. What is magical inside the black box?
Memory
card
Video
Card
Power
Supply
Sound
Card
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8. The Components of a Computer
What are two main components on the
motherboard?

Central Processing Unit (CPU)
Also called a processor
Carries out instructions
that tell computer what to do

Memory
Temporary holding place for data
and instructions
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9. The Components of a Computer
What is storage?

Holds data, instructions, and information
for future use
Storage media
Physical material on which data, instructions,
and information are stored
Storage device
Records and retrieves items to and from
a storage medium
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10. Storage device
What is a floppy disk?


Thin, circular,
flexible disk
enclosed in rigid
plastic shell
A Zip® disk looks
similar but has
much greater
storage capability
(=170 floppy disk)
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11. The Components of a Computer
What is a hard disk?


Provides much
greater storage
capacity than a
floppy disk or
Zip® disk
Housed inside the
system unit
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12. The Components of a Computer
What is a compact disc?

Flat, round, portable metal disc
 CD-ROM
 CD-RW
Capacity: 673~768 MB


DVD-ROM
DVD+RW
Capacity:4.7 ~ 17.1 GB
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13. The Components of a Computer
What is miniature storage
media?
Portable, thin
memory cards
used in:
Digital
cameras
Handheld
computers
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14. Why Is a Computer So Powerful?
What makes a computer powerful?

Speed

Reliability

Accuracy

Storage

Communications
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15. Computer
Analog
Supercomputers
Digital
Mainframe
computers
Hybrid
Minicomputers
Microcomputers

16. Categories of Computers
What are the categories of computers?
Personal computers (desktop)
Minicomputers
Mainframe computers
Supercomputers
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17. Personal computers (desktop)
Microcomputers are the most common kind of computers used
by people today, whether in a workplace, at school or on the
desk at home. The term “microcomputer” was introduced with
the advent of single chip microprocessors.

18. Minicomputers
A minicomputer (colloquially, mini) is a class of multi-user
computers that lies in the middle range of the computing spectrum,
in between the smallest multi-user systems (mainframe computers)
and the largest single-user systems (microcomputers ). The
contemporary term for this class of system is midrange computer,
such as the higher-end SPARC, POWER and Itanium -based
systems from Oracle Corporation. E.g.- Laboratory computers

19. Mainframe computers
The term mainframe computer was created to distinguish the
traditional, large, institutional computer intended to service multiple
users from the smaller, single user machines. These computers are
capable of handling and processing very large amounts of data quickly.
Mainframe computers are used in large institutions such as
government, banks and large

20. Supercomputers
A supercomputer is focused on performing tasks involving
intense numerical calculations such as weather forecasting, fluid
dynamics, nuclear simulations, theoretical astrophysics, and
complex scientific computations.

21. Personal Computers
What are the two most popular series of personal
computers?

PC and compatibles
use the Windows
operating system

Apple Macintosh
uses the Macintosh
operating system
(Mac OS)
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22. Personal Computers
What is a notebook computer?

Portable, small enough to fit on
your lap(2 lbs to 9 lbs )

Also called a laptop

Generally more expensive than
a desktop computer
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23. Handheld Computers
What is a tablet PC?



Resembles a letter-sized slate
Allows you to write on the screen
using a stylus
Smaller version is the modular
computer
What are Web-enabled handheld computers?


Allow you to check e-mail and access the Internet
Web-enabled telephone is a “smart phone”
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24. Handheld Computers
What is a personal digital assistant (PDA)?

Provides personal organizer functions





Calendar
Appointment book
Address book
Calculator
Notepad
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25. Examples of Computer Usage
What are five categories of computer users?
Home
Large Business
Small Office/
Home Office (SOHO)
Mobile
Power
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26. Computer Applications in Society
What
are some examples
of computer applications
in society?








Education
Finance
Government
Healthcare
Science
Publishing
Travel
Industry
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27. Conclusion
Who needs nuclear weapons when you have
the power of the internet ~ Leah Wakefield
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