This document provides an introduction to computers. It defines a computer as an electronic machine that can solve problems, process and store data, and perform calculations faster than humans. The document discusses different types of computers like desktops, laptops, and supercomputers. It compares desktops and laptops, noting laptops are smaller and more portable but have less powerful hardware. The document outlines characteristics of computers like how they use data and storage. It also describes the different generations of computers from the first generation using vacuum tubes to the latest fifth generation with advanced artificial intelligence. In closing, the document invites any questions about computers.

1. Introduction to Computer
Md.Ibrahim Khalil
Id:16173207095
Program: B.Sc.in Textile Engg.
Bangladesh University of Business & Technology
Intake:19

2. Defination of Computer
 “A Computer is an electronic machine that
can solve different problems, process data,
store & retrieve data and perform
calculations faster and efficiently than
humans”.

3. Types of Computer
 Desktop
 Laptop
 Workstation
 Tab
 Notebook
 Supercomputer and Mainframe. ...
 Minicomputer. ...
 Personal computer: ...

4. Compare Desktop & laptop
Desktop Laptop
 Size Comparatively large  Size Comparatively
small
 Repairing cost Low  Repairing Cost High
 Use at Desk  Use at Lap, desk,
anywhere (mobile)
 Upgradation Easy • Upgradation Difficult
 Hardware (for the same
money) More powerful
 Hardware (for the same
money) Less powerful
 Graphic adapter More
powerful
 Graphic adapter Less
powerful

5. Computer Picture
Desktop Laptop

6. Characteristics of Computer
 Data : Data is a raw material of information.
 Information : Proper collection of the data is called
information.
 STORAGE : Computer can store mass storage of data with
appropriate formate.
 NO IQ : Computer does not work without instruction.
 DILIGENCE : Computer can work for hours without any break
and creating error.
 Keyboard : This is an input device which is used to input the
data into the computer.
 Mouse : This is also an input device which is used to input
the data into the computer.
 Monitor : This is an output device which is used to show the
result of the instructions.
 CD/DVD ROM : This is used to store the data.
 Hard Disk (HDD) : There are so many type of HDD available in
the market, i.e. SATA, PATA, External HDD, Internal HDD.

7. Computer Generation
 First generation
 Second generation
 Third generation
 Fourth generation
 Fifth generation

8. First Generation
The main features:-
 Vacuum tube technology
 Supported machine language only
 Very costly
 Generated a lot of heat
 Slow input and output devices
 Huge size
 Need of AC
 Non-portable
 Consumed a lot of electricity

9. Second Generation
The Main features:-
 Use of transistors
 Reliable in comparison to first generation computers
 Smaller size as compared to first generation computers
 Generated less heat as compared to first generation
computers
 Consumed less electricity as compared to first generation
computers
 Faster than first generation computers
 Still very costly
 AC required
 Supported machine and assembly languages

10. Third Generation
The Main Features:-
 IC used
 More reliable in comparison to previous two generations
 Smaller size
 Generated less heat
 Faster
 Lesser maintenance
 Costly
 AC required
 Consumed lesser electricity
 Supported high-level language

11. Fourth Generation
The Main Features:-
 VLSI technology used
 Very cheap
 Portable and reliable
 Use of PCs
 Very small size
 Pipeline processing
 No AC required
 Concept of internet was introduced
 Great developments in the fields of networks
 Computers became easily available

12. Fifth Generation
The main features :-
 ULSI technology
 Development of true artificial intelligence
 Development of Natural language processing
 Advancement in Parallel Processing
 Advancement in Superconductor technology
 More user-friendly interfaces with multimedia features
 Availability of very powerful and compact computers at
cheaper rates

13. Any Question

14. Thank You