basic level of computer & help full for that

1. Computers Are
Your Future
Week 1

2. Slide 2
Computers Are Your Future
Introduction to Computer

3. Slide 3
Computers & You
Workers with computer and Internet skills tend to
make more money and have more satisfying careers
than workers without such skills.

4. Slide 4
Understanding the Computer: Basic Definitions
Computer – A machine
that performs the four
basic operations of the
information-processing
cycle:
input
processing
output
storage

5. Slide 5
Understanding the Computer: Basic Definitions
Computer system – A collection of related
components that are designed to work together
A system includes hardware and software.
Hardware Software

6. Slide 6
Understanding the Computer: Basic Definitions
Program – A list of instructions that tell the
computer how to perform the four basic operations to
accomplish a task

7. Slide 7
Understanding the Computer: Basic Definitions
Software – All the programs that give the computer
its instructions
Two categories of software:
System software Application software

8. Slide 8
Input: Getting Data into the Computer
 Data – Unorganized raw materials made up of words,
numbers, images, or sounds
 The first operation: input
• Input devices enable the user to enter data into the
computer.
• The computer accepts data.

9. Slide 9
Keyboard Mouse – pointing device
Microphone –
speech-recognition
Digital Cameras
Input Devices

10. Slide 10
Processing: Transforming Data into Information
The second operation: processing
Computers transform data into information.
Processing circuitry:
 Central processing unit (CPU)
 Random access memory (RAM)
DATA IN INFORMATION OUT

11. Slide 11
Motherboard
Central Processing Unit – CPU
Random Access
Memory– RAM
Expansion Card
Processing Devices

12. Slide 12
Output: Displaying Information
The third operation: output
The computer shows the results of the processing operation
in a way people can understand.
Output devices show the results of processing operations.

13. Slide 13
Monitor
Printer
Speakers
Output Devices

14. Slide 14
Storage: Holding Programs and Data
for Future Use
The fourth operation: storage
The computer saves the data or output so that it can be used
again later.
Storage devices hold all programs and data that the
computer uses.

15. Slide 15
Hard Drive
Floppy Disk Drive
Zip
Drive
CD/DVD
Drive
Jaz
Drive
Tape
Drive
Micro Drive
Storage Devices

16. Slide 16
Communications: Moving Data
between Computers
A fifth operation: communications
Moving data within the computer or between computers
 Communications devices – Enable computers to connect to a
computer network
 Network – Two or more computer systems that are
connected
 Modem – A device that enables the computer to access other
computers

17. Slide 17
Modem
Network Interface
Card – NIC
Communications Devices

18. Slide 18
The Information Processing Cycle In Action
 Input – You enter text in a
word processing program.
• You run the program’s spell
checker program.
 Processing – The computer
checks and compares all
words entered with a list of
correctly spelled words.
 Output – The computer
provides a list of apparent
misspellings.
• You correct the spelling in
your document.
 Storage – You save the
revised document to a disk.
Compoters
A computer is a machine that perfirms four basic
operations: input, processing, output, and
storage. Together, these four operations are
called the information proceesing cycle.

19. Slide 19
Desktop – PC, iMac
Notebook – Laptop
WorkstationPersonal Digital
Assistant
Types of Computers
Computers for Individuals
Internet ApplianceAll-in-One

20. Slide 20
Computers for Individuals
 PC
 Notebook ? Laptop? (fit into briefcase)
 Subnotebook: notebook that omit some components.
 Tablet PC: is a type of notebook that has an LCD screen that
the user can write on using special-purpose pen.
 All-in-one: Apple iMac is a monitor with everything else built
in. the only external devices are keyboard and mouse.
 Internet appliances: computers designed to connect to network
such as internet.
 Workstation: powerful tools for professionals who needs
exceptionally powerful processing and output capabilities

21. Slide 21
Types of Computers
Computers for Organizations
 Servers are not
designed for
individuals. They
make programs
available for network
users.
 Minicomputers
handle the computing
for small
corporations.
 Mainframes
handle gigantic
processing jobs
for large
corporations or
agencies.
 Supercomputers
are ultra-fast and
handle huge
amounts of
scientific data.