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.
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Introduction to computer
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
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