স্বাগতম

স্বা�গতম

Afia sultana chowdhury

Junior instructor(computer)

TSC Tangail

Class – IXSection-AShift- 1st

Computer Information and technology

What is a computer?What is the weakness of computer?

Topic in the presentation is

Block diagram of a computer

At the end of this session, the learner will beAble to:

Draw and explain a block diagram of computerIdentify input deviceIdentify output device

Input UniteArithmetic logic unit(ALU)

CPU

Output UniteMEMORY

Block diagram of a computer

This is the process of entering data and programs in to the

computer system.

Input unit:

Input device

Mouse

Scanner

Keyboard

Webcam

Microphone

Joystick

CentralProcessingUnit:

The control unit and ALU of the computer are together known as the Central Processing Unit (CPU).TheCPUis like brain performs the following functions

CPU

Microprocessor

Storage Unit: The storage unit of the computer holds data and instructions that are entered through the input unit, before they are processed.

Harddisk RAM

Portable harddisk

OutputUnit:

The output unit of a computer provides the information and results of a computation to outside world. Printers, Visual Display Unit (VDU) are the commonly used output devices.

Output device

Monitor

SpeakerPloter

Printer

Projector

Line printer

1.Is mouse a output device?

2.Write the abbreviation of ALU ?

Home work:1.Draw a block diagram of a computer

2.List the name of input and output device of a desktop computer

Next Topics:

Types of computer

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