the different components of a computer system

The different components of a

computer system

What is a computer?A computer is an electronic device that manipulates information, or data.

The system Unit

Keyboard Mouse

It is called a Computer System: As it is not a single machine but a collection of many devices which work together to perform a task.

Monitor

Parts Of The Computer System

Hardware Software Data or Information User

Users

Peoples are the computer operators, also known as users.

What is hardware?

Computer hardware refers to the physical parts or components of a computer

All of which are physical objects that can be touched

Computer Hardware

Internal components (e.g. Hard disk, RAM, Graphics Card etc..) External parts ( e.g. Monitor, keyboard, mouse etc..)

8

What is Peripheral? (External parts of computer)

A peripheral is the general term used to describe devices which are externally connected to a computer.

Input Devices:used to interact with or send data to the computer e.g. mouse, keyboards, etc…

Output Devices:which provides output to the user from the computer e.g. monitors, printers, etc…

Storage Devices:which stores data processed by the computer e.g. Hard drives, flash drives, etc…

Network devices:

What you put into a computer (input) controls what you get out of it (output). The equipment which you use to put information (called data) into a computer is called input devices. The equipment we use to get out of the computer is called output devices.

Activity

A. Input and Output devices

1.Here are some input devices. Write the missing letters.

(1) k __ __ __ __ __ __ d (2) j __ __ s __ __ __ k (3) __ __ u __ e (4) s __ __ n n __ r

2. Here are some output devices. Write the missing letters.

(1) l a s __ __ P __ __ n __ __ r (2) __ __ n __ t __ __ (3) S p __ __ k __ __ __ (4) p __ __ t __ e __

4. Sort these devices into the correct column.Scanner, Printer, Keyboard, Mouse, Monitor, Joystick, Speaker, Projector, Dongles and modemsDigital camera, Microphone, Barcode reader, Webcam, Game controller, USB flash drives, Plotter,

touch screen

Input Devices Output Devices I/O Devices Storage Devices Network Devices

11

12

Storage Byte – Stores the equivalent of one character. Kilobyte (1 KB) – 1,024 bytes.

Megabyte (1 MB) – 1,048,576 bytes.

Gigabyte (1 GB) – 1,073,741,824 bytes.

Terabyte (1 TB) – 1,099,511,624,776 bytes.

13

B. Storage devices

Draw lines to match the different secondary storage devices to the read/write equipment.

Activity

What is software?

Software is a Set of Instructions that makes the computer perform tasks. In other words we can say that, software tells the computer what to do.

Will learn more about software on the 3rd day……..

1. What is a computer?2. How the data stored or how the computer sees the data?3. What is hardware?4. Give some Examples for internal components of a computer?5. Give some examples for external parts of computer?6. What is software?7. What are the main types of PC?8. Give some examples for the companies that makes PC?9. What is a server?

Quiz Time

What is data?

DATA is a collection of independent and Unorganized Facts.

Types of DataTextNumbersGraphicsAudioVideoImages

What is information?

Information is the processed and Organized data presented in a Meaningful form.

Information Processing Cycle

PROCESSING SYSTEMDATA INFORMATION

A computer Primary job is to process these tiny pieces of Data in various ways, Converting them into useful Information

Raw Data

Context

Information

Process

51,77,58,82,64,70

Test scores achieved by students

Average test score is 67%. This shows that the first

student’s mark is way below average

Process

Example:

Data Information

MeaningData is raw, unorganized facts that need to be processed. Data can be something simple and seemingly random and useless until it is organized.

When data is processed, organized, structured or presented in a given context so as to make it useful, it is called Information.

Example Each student's test score is one piece of dataThe class' average score or the school's average score is the information that can be concluded from the given data.

Functions of an Information Processing System

1. It accepts and gather data (INPUT)2. It processes data to become information (PROCESSING)3. It stores data and information (STORE)4. It presents information (OUTPUT)

What is input?

Any information or data that's Entered or sent to the computer to be Processed is considered Input.

What is output?

Any information that has been processed and comes from a Computer or computer device is considered output.

Why we use computer?

Think about the Activities you perform or want to perform using a computer

Challenge!

Don’t you use computer to Type documents?

Don’t you Send Email & Browse the Web?

Is it a Computer that controls Stoplights so you can drive to work?

How did the Cashier scan and Calculate your Grocery items?

Is the Weather map on Television Computer-generated?

Don’t you use computer to communicate?

Entertainment

What makes a Computer Powerful?1. Speed

2. Reliability

3. Accuracy

4. Storage

5. Communications

• Desktop Computer • Laptop• Netbook• Tablet• PDA (Personal Digital Assistant)

• SmartPhone

Types Of Computer Equipment

What is PC?A computer designed for use by one person at a time.

Desktop ComputerLap top Computer

What are the different types of PCs?

40

What is a desktop computer?

Designed so All of the Components fit on or under a Desk or Table

41

What is Laptop computer?A computer that is portable small enough to fit on your lap and suitable for use while travelling.

What are the Main types of software?

System software Application software

43

What is system software?

Operating System (OS)is a set of programs that coordinates all activities among computer hardware devices and allows users to run application software

Utility Programs allow the user to perform maintenance-type tasks usually related to managing a computer, its devices or its programs

Programs that control the operations of the computer and its devices

44

Computer SoftwareWhat is application software?

Presentation Graphics

Spreadsheet

Database

Word Processing

Programs that perform specific tasks for users