1 CIM 101 Introduction to Computer Course Teacher

1 CIM 101 Introduction to Computer Course Teacher : Kazi Saiful Alam(Rehan) Course credit : 3. 0 Prerequisite : Nil

2 9/6/2021 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

3 9/6/2021 Recommended Text • Introduction to Computers – ▫ Peter Norton, Mc. Graw 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.

4 Lecture 1 Introduction to computer system

5 9/6/2021 Objective • After this lecture , students are going to know: q. What is meant by ‘computer’ q. Why should we call it a system q. Computer system units/major hardware classification q. Characteristics q. Work flow of a computer q Components of the system

6 9/6/2021 Different looks of computer Laptop Desktop

Computer system Monitor System Unit Speaker Keyboard Mouse

Elements

Inside System unit

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11 9/6/2021 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.

12 9/6/2021 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

13 9/6/2021 Work flow Input Process Output • Input data from disk, keyboard or other storage media • Process data • Output results to display screen, disk or other media

14 9/6/2021 Components • Basic components of a computer system are ▫ Hardware ▫ Software ▫ Human ware

15 9/6/2021 Hardware Refers to machines or physical equipment that performs the basic functions of data processing. Example: Printer, Keyboard, Mouse etc.

16 9/6/2021 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.

17 9/6/2021 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. )

18 9/6/2021 Human ware Refers to the persons who design, program and operate a computer. Three principal positions: System analysts Defines the application problem Determines systems specifications Recommends hardware and software Designs information-processing procedures Programmer Prepare programs based on the specification made by systems analyst Computer operator Performs a series of well-defined tasks to keep the computer operating at maximum efficiency

19 9/6/2021 Question session Please feel free to ask any questions ……. . Thank You