1. 201202564 Sara Naheed Amjad Information Technology
Computer & it’s components

2. Outline What is computer ? 5 Computer Components Data & Collection
Information Processing Cycle
5 Computer Components
Input
Output
System Unit
Storage Device
Storage Media
Communication Device

3. Computer What is a Computer ?
A computer is an electronic device, operating under the control of instructions stored in its own memory

4. Computer process Data into information
it is a collection of unprocessed items, which can include text, numbers, images, audio and video
Information :
It conveys meaning and is useful to people

5. Computer
Process
Data
Store the results
Accept Data
Produce Results

6. Information Processing Cycle
Computer process data (input) processes it (process) using information (output). Computer holds data information and instructions (storage ). Most computers communicate with other computer (communication)

7. Components of a Computer
A computer contains many electric, electronic and mechanical components known as hardware. This components include:
Input Device
Output Device
System Unit
Storage Device
Storage Media
Communications Device

8. Components of a computer
Input Device
An input device allows you to enter data or instructions into a computer
Examples of input device
Keyboard
Mouse
Microphone
Scanner
Webcam

9. Examples of input device

10. Components of a computer Output Device
An output device is any hardware component that conveys information to one or more people. Three most common used output device are :
Printer
Monitor
Speakers

11. Examples of output device
Monitor
scanner
Speakers

12. Components of a computer
System Unit
The System unit is a case that contains the electronic components of the computer that are used to process data
A system unit includes a board called motherboard
A mother board contains two component known as:
Processor
Memory

13. Processor
Processor is also called a CPU (Central Processing Unit) , it is the electronic component that interprets and carries out the basic instruction that operate the computer

14. Memory
It consists of electronic components that store instructions waiting to be executed and data needed by those instruction

15. Components of a computer Storage Devices
Storage holds data, instructions and information for future use
Storage Media
Storage Device
A computer keeps data, instructions and information on storage media
A storage device records and reads items to and from storage media

16. Examples Storage Device Storage Media USB DVD Drive Hard Disk CD ROM
Memory card Drive
USB
Hard Disk
Memory cards

17. Components of a computer
Communication Device
A communication device enables a computer to send and receive data, instructions and information to and from one or more computer or mobile devices
Example of Communication Device is Modem

18. Machine Cycle Set of four basic operations :
Fetching: it is the process of obtaining a program instruction or data item from memory
Decoding: used to translate the instructions into signals the computer can execute
Executing: it is the process of carrying out the command
Storing: writing the result to memory

20. References