Computer Notes”

Computer:

 Computer is an electronic device which can work under the given instruction.

Origin of Computer:

The word computer has been taken from a latin word ‘Compute’ which means ‘to calculate or to solve’

Main Parts Of Computer:

1) Mouse

2) Keyboard

3) System Box/System Unit

4) Moniter/LCD

Components of Computer:

1)        Hardware

2)        Software

1)           Hardware:

The touchable part of computer is called Hardware.

EX: Mouse,Keyboard,moniter,cpu,ram etc.

            Types Of Hardware:

1)         Input device

2)         Output device

3)         Storage device

4)         Processing device

                  Input Device:

Those devices which are used for entering the data in various instruction to the computer is called Input device.

EX: Mouse, keyboard, mic ,  light pen, scanner etc.

                        Output Device:

Those devices which are used for the showing/displaying the result of input instructions in hard or soft is called Output device.

EX: Monitor, speaker, printer etc.

                        Storing Device:

Those devices which are used for the storing of  data permanentlly  in the computer is called Storing device.

EX: USB, Memory card, Floppy disk, Hard disk, CD, DVD etc

                     Processing Device:

Those devices which convert the data into useful information are called Processing device.

EX: CPU (Central processing unit)

2)           Software:

The untouchable part of computer is called Software.

EX: Programms, videos, audios, Games etc

                            Types of Software:

1)                                      Application Software

2)                                      System  software

Application Software:

Those programs / Software which fulfill the requirments of user/operator is called Application software.

EX: Games, MS official, Corel draw, google chrome etc.

                    System Software:

Those programs /softwares which fulfill the requirments of System/computer is called system software.

EX: Windows xp, windows 7, windows 8, windows 10, windows server, mac, linux, computer driver.

         Storage System:

1)        0,1 = Bit

2)        4 Bits = 1 Nibble

3)        8 Bits = 1 Byte/1 Octet

4)        1024 Bytes = 1 KB (Kilo byte)

5)        1024 KB = 1 MB (Mega byte)

6)        1024 MB = 1 GB ( Gega byte)

7)        1024 GB = 1 TB   (Tera byte)

            Number System:

There are four number systems,

1)         Binary number system:

0,1 (2)

Computer language/Machine language

2)         Octet number system:

0,1,2,3,4,5,6,7,(8)

3)         Decimel number system:

0,1,2,3,4,5,6,7,8,9,(10)

4)         Hexa decimel number system:

0,1,2,3,4,5,6,7,8,9,

A,B,C,D,E,F,(16)

Q: What is System Box?

Processor

Slots

Cards

            Name of Processors:

CPU (central processing unit)

Brain of computer

Processor

        Name of Cards:

VGA Card

Graphic Card

3D Card