CIM101Introduction to Computer

Course Teacher : Kazi Saiful Alam(Rehan)Course credit : 3.0Prerequisite : Nil

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Course goal

• After completing the course , we will have clear concept on :– What is Computer?– Basic parts of a computer system(I/O

device ,CPU,...)– Hardware & Software and their

classifications– Different types of hardware & software– Basic knowledge on the internet– Basic knowledge on the multimedia

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Recommended Text

•Introduction to Computers –▫ Peter Norton, McGraw Hill, International

Edition•Computer Fundamentals –

▫Dr. M. Lutfar Rahman and Dr. Alamgir Hossain.

•The contents from other books will be presented depending on the requirements of the course.

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Lecture 1Introduction to computer system

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Objective

• After this lecture , students are going to know:What is meant by ‘computer’Why should we call it a systemComputer system units/major hardware classification

CharacteristicsWork flow of a computer Components of the system

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Different looks of computer

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Laptop

Desktop

Computer system Monitor

Speaker

KeyboardMouse

System Unit

Elements

Inside System unit

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Computer System• What do we understand by the word

‘computer’?– The modern definition of a computer is an electronic

device that performs calculations on data, presenting the results to humans or other computers in a variety of (hopefully useful) ways and store it .

– Not just a single machine but a combination of many devices and instructions to operate those devices.

– The devices(Hardware) and the instructions(Software) all together make a computer.

– So it is a system not just a device.

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Characteristics of a computer▫Millions and billions times faster than

human brain▫Does not get tired▫Does not produce wrong output unless

there is something wrong with data or instruction set

▫ Limited memory▫No independent thinking or reasoning

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Work flow

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Input Process Output

•Input data from disk, keyboard or other

storage media

•Process data

•Output results to display screen, disk or

other media

Components

•Basic components of a computer system are ▫Hardware▫Software ▫Human ware

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Hardware

Refers to machines or physical equipment

that performs the basic functions of data

processing.

Example:

Printer, Keyboard, Mouse etc.

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Computer System Units • The generic computer

contains

▫ a computational unit▫ Input

devices(keyboard,mouse). ▫ Output devices(monitors,

printers).

• The computational unit is the computer's heart, and usually consists of a central processing unit (CPU), a memory, and an input/output (I/O) interface.

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Software Computer programs

Sets of instructions which directs a computer to perform

certain function.

Programs are referred to as software

Software is of two types:

System Software ( helps computer to perform tasks, e.g.

Windows XP, Vista,Linux etc.)

Application Software ( helps by performing user

applications, Microsoft power point , windows media

player etc.)

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Human ware Refers to the persons who design, program and operate a

computer.Three principal positions:

System analysts Defines the application problemDetermines systems specificationsRecommends hardware and softwareDesigns information-processing procedures

ProgrammerPrepare programs based on the specification made by

systems analyst

Computer operatorPerforms a series of well-defined tasks to keep the

computer operating at maximum efficiency

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Question session

Please feel free to ask any questions ……..

Thank You

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