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OS, Ms-Office & Internet D. Kalidas Manager – Technical CSC Computer Education (P) Ltd Introduction To Computer What Is Computer ? It comes from the word “Compute” Difference Between A Computer & Calculator Father Of Computer Charles Babbage 1822 – Difference Engine

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OS, Ms-Office & Internet

D. Kalidas

Manager – Technical

CSC Computer Education (P) Ltd


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Introduction To Computer

What Is Computer ?

It comes from the word “Compute”

Difference Between A Computer & Calculator


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Father Of Computer

Charles Babbage

1822 – Difference Engine

1842 – Analytical Engine


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Father Of Computer

1822 – Difference Engine

1842 – Analytical Engine


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Characteristics of Computer

  • Speed

  • Accuracy

  • Diligence – Free from monotony, tiredness

  • Versatility

  • Storage Capacity

  • No I.Q

  • No Feeling


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Computer Generation

  • First Generation (1942 – 1955)

  • Second Generation (1955 – 1964)


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Computer Generation

  • 3) Third Generation (1964 – 1975)

  • 4) Fourth Generation – SSI (Small Scale Integration)

  • - LSI (Large Scale Integration)

  • 5) Fifth Generation – Artificial Intelligence


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Classification of Computer

  • Digital Computers

  • Analog Computers

  • Hybrid Computers




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Input Devices

1) Keyboard


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Input Devices

2) Joystick


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Input Devices

3) Light Pen


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Input Devices

4) Mouse


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Input Devices

4) Touch Pad


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Input Devices

5) MICR (Magnetic Ink Character Recognition)


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Input Devices

6) Bar Coding


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Input Devices

7) Scanner


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Input Devices

8) Digital Camera


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Output Devices

1) Monitor – CRT - LCD


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Output Devices

2) Printers - Daisy Wheel Printer

- Line Printer


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Output Devices

2) Printers - Dot Matrix Printer


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Output Devices

2) Printers - Ink Jet Printer


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Output Devices

2) Printers - Laser Printer


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Storage Device

  • Primary Storage Device

    • ROM (Read Only Memory)

    • PROM (Programmabel ROM)

    • EPROM (Erasable PROM)

    • EEPROM (Electrically EPROM)

    • RAM

  • Secondary Storage Device

    • Floppy Disk (FDD)

    • Compact Disk (CD)

    • Hard Disk (HDD)

EPROM

RAM


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Secondary Storage Device

  • Floppy Disk (FDD)


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Secondary Storage Device

  • Hard Disk (HDD)


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Secondary Storage Device

  • CD Drive / DVD Drive


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Representing Characters In Memory

8 Bit - 1 Byte

1024 Bye - 1 Kilo Byte (KB)

1024 KB - 1 Mega Byte (MB)

1024 MB - 1 Giga Byte (GB)

1024 GB - 1 Tera Byte (TB)


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Hardware & Software

Hardware – Physical Components of a computer

Software – Set of Programs Or instruction Written By The Users




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Concept Of Operating System

  • Optimizes man-machine capabilities

  • Integrated system of programs

  • Supervises operations of CPU

  • Controls Input / Output




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Computer Virus

Computer virus is a program that is loaded onto your computer without your knowledge and runs against your wishes

  • Activities of Computer Virus?

  • It perform some activities like deleting

    files or disturbing your computer settings.

  • All computer viruses are man made.

  • A simple virus is dangerous because it will quickly use all available memory and bring the system to a halt.



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Internet

Internet stands for Interconnected Network – Connected Through Telephone Wires.

The Internet, a network of networks, is popularly called the net.


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History of Internet

1969 – ARPANET (Advanced Research Projects Agency Network)

1980 – NSFNET (National Science Foundation NET)


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Requirement For Connecting To The Internet

  • Modem

  • Telephone Line

  • Subscription with Interest Service Provider (ISP)

  • Web Browser


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Types of Modem

  • Internal Modem

  • External Modem


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Web Browser

  • Software Application used to locate and display the web page

  • Netscape Navigator

  • Internet Explorer

  • Fire Fox

  • Mozilla


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Web Page

A web page is a document on the Web. Web Pages can include text, pictures, sound and video.


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Web Site

The website is a of one or more related web pages, linked together through a system of hyperlinking.

A website is similar to a magazine


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Home Page

First Page of information when the website is typed

Typically contains introductory information about the website


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Hyperlink

A hypertext document contains highlighted text that connects to other pages on the web.

When the mouse pointer moved over a hypertext or hiperlink the shape of the cursor changes to a hand sysbol

Example


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URL

Uniform Resource Locator

Each web page has a unique address called URL

You can instantly display the webpage if we know the URL

Example

www.iteducationjobs.com

www.rediffmail.com

www.tn.nic.in

www.gmail.com


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Search Engines

A search engine is a program that searches through a collection of web pages for particular information

Examples

www.altavista.com

www.altheweb.com

www.google.com

www.hobot.lycos.com

www.infoseek.com


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Electronic Mail

Exchange electronic mail (e-mail) with people around the world.

E-Mail Address

Username@domainname

Eg: kalidas@iteducationjobs.com

das@gmail.com

kalidas_dk@rediffmail.com

kalidas87@yahoo.co.in


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Parts Of A Message

  • From

  • To

  • Subject

  • CC

  • BCC

  • Message



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MS-OFFICE

  • MS-OFFICE

  • MS-Word

  • MS-Excel

  • MS-PowerPoint

  • MS-Outlook Express



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