TASKBAR

TASKBAR

A bar commonly located at the bottom of Microsoft Windows 95, Windows 98, Windows NT Windows 2000, Windows ME, Windows XP , and Windows 7 operating systems that displays the programs that are currently running. This bar also displays the time, Systray, and in later revisions of the Windows operating system. This is the Taskbar

What is a Desktop

What is a desktop?
When you start your computer, the first thing you see is the desktop. The desktop is your work area.

HOW TO START COMPUTER

HOW TO START COMPUTER

1. Switch on the power.
2. Switch on the C.P.U. Button.
3. Switch on the Monitor Button.

after that you computer will be start. Your computer screen will be like this as given above picture.

OUTPUT DEVICES

OUTPUT DEVICES

Any peripheral that receives and/or displays output from a computer. Below are some examples of different types of output devices commonly found on a computer.
Monitor
Printer
Projector
Sound card
Speakers
Video card

INPUT DEVICES

INPUT DEVICES

A hardware device that sends information into the CPU. Without any input devices a computer would simply be a display device and not allow users to interact with it, much like a TV. Below is a listing of different types of computer input devices.
Digital camera
Joystick
Keyboard
Microphone
Mouse
Scanner
Web Cam

BLUETOOTH TECHNOLOGY

BLUETOOTH

Bluetooth is a standard and a communications protocol primarily designed for low power consumption, with a short range (power-class-dependent: 1 metre, 10 metres, 100 metres) based on low-cost transceiver microchips in each device.

More prevalent applications of Bluetooth include:

Wireless control of and communication between a mobile phone and a hands-free headset. This was one of the earliest applications to become popular.
Wireless networking between PCs in a confined space and where little bandwidth is required.
Wireless communication with PC input and output devices, the most common being the mouse, keyboard and printer.

Computer Requirements:

A personal computer must have a Bluetooth adapter in order to communicate with other Bluetooth devices (such as mobile phones, mice and keyboards). While some desktop computers and most recent laptops come with a built-in Bluetooth adapter, others will require an external one in the form of a dongle.

SCANNER

SCANNER

In computing, a scanner is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image.

OPERATING SYSTEM

OPERATING SYSTEM

Operating system is system software. It works like interface between user and computer system. It configure to computer. It configures Harddisk, RAM, and Floppy Disk etc. It is a language-based software like C, C++, Java. It is primary software over which other application software is installed. Application software means MS-Word, Excel, PowerPoint etc. is application software. There are many operating system in the market:- Window 3.11, 3.1, 95, 98, 2000 professional, ME, XP, Vista and Window 7.

DATA

WHAT IS DATA ?

Data is a raw material. It is a collection of facts and figures. we type anything in the computer it is called data.

BITS

BITS

Small storage unit of measurement. Mean
8 bits makes 1 bytes
1 byte means 1 character mean 1 word of english word like 'A'
for example you type I LOVE YOU. in this line character is 7. got it.
1024 bytes makes 1 Kilobyte (KB)
1024 kilobytes makes 1 Mega byte (MB)
1024 Mega Byte makes 1 Giga Bytes. (GB)
File size comes in kb and mb
but harddisk and pen drive sizes comes in GB.

TV TUNER CARD

TV TUNER EXTERNAL CARD

TV TUNER CARD

A TV tuner card is a computer component that allows television signals to be received by a computer. Most TV tuners also function as video capture cards, allowing them to record television programs onto a hard drive. You can enjoy TV programs on your computer. There are two type of TV Tuner Card:-
1. Internal
2. External.
1. Internal TV Tuner Card:- We put this card into the CPU. We can use this card only when the PC is On. Means without On Computer we cannot see TV program on the computer..

2. External TV Tuner Card:- We can put this card outside of CPU. We can use this card also when the PC is off. Mean we can see TV Programs on the computer when the PC is off.

MOUSE

MOUSE
A hand-operated electronic device that controls the coordinates of a cursor on your computer screen as you move it around on a pad; on the bottom of the device is a ball that rolls on the surface of the pad; "a mouse takes much more room than a trackball" We give all commands to computer through mouse.

KEYBOARD

KEYBOARD

Computer keyboard is a peripheral modeled after the typewriter keyboard. Keyboards are designed for the input of text and characters, and also to control the operation of the computer.

MONITOR

MONITOR
Monitor is an output device. Which work we do on computer we look that work on the monitor.

LAN CARD

LAN CARD NIC (Network Interface CARD)

It is used for Networking. Networking means connecting one computer to another computer to share the resources and databases (mainly printer and scanner). If this card is not present in the system so you cannot connect one computer with other computers.

SOUND CARD

SOUND CARD

It is used for sound. If this card is not present so you cannot hear any sound from computer means you cannot hear any song, movie voice etc.

VIDEO CARD

VIDEO CARD

It is used for monitor display. If this card is not present in your computer then your computer monitor's display won’t come.

PEN DRIVE / USB DRIVE / FLASH DRIVE

PEN DRIVE/USB DRIVE/FLASH DRIVE

Pen Drive is a small keyring-sized device that can be used to easily transfer files between USB-compatible systems.

DVD ROM DRIVE

DVD ROM DRIVE

You can play dvd only in dvd rom drive. In this drive you can play cd and dvd.
CD-ROM DRIVE:- you can play only cd in this drive.
CD WRITER DRIVE:- drive you can play and write your cd in this cd writer drive.
COMBO DRIVE:- You can play & write your CD and Play DVD in this Drive.
DVD WRITER ROM DRIVE:- You can Play & write your CD and DVD in this drive.

DVD

DVD

DVD (also known as "Digital Versatile Disc" or "Digital Video Disc") is a popular optical disc storage media format. Its main uses are video and data storage. Most DVDs are of the same dimensions as compact discs (CDs) but store more than 6 times the data.

CD ROM DRIVE

CD-ROM DRIVE (D: Drive )

A CD-ROM (Compact Disk Read Only Memory) is a drive, which reads aluminum-coated round plastic discs. You can play audio and video cd on this CD-ROM. You can not write your cd from CD-Rom Drive. If you want to copy your data mean write your data on CD then you should have CD-Writer Rom Drive. You can write your CD only through CD-Writer. In Short you want to play and write your CD then you should have CD-Writer Rom Drive.

CD: COMPACT DISK

CD (COMPACT DISK)

CD-ROM (an abbreviation of "Compact Disc Read-Only Memory") is a compact disc that contains data accessible by a computer. While the compact disc format was originally designed for music storage and playback, the format was later adapted to hold any form of binary data. CD-ROMs are popularly used to distribute computer software, including games and multimedia applications, though any data can be stored (up to the capacity limit of a disc). Some CDs hold both computer data and audio with the latter capable of being played on a CD player, whilst data (such as software or digital video) is only usable on a computer. These are called Enhanced CDs. CDs’ comes in different. CD comes is many storage capacity. For e.g. 700 MB, 800 MB.
There are two types of CD in the market:-
1. Writable CD- You can write (store) your data only once time on this CD.

2. Re-writable CD- You can write (store) your data many times on this CD.

FLOPPY DISK DRIVE (FDD)

FLOPPY DISK (FDD) 3 ½” FLOPPY DISK (A: Drive )

A soft magnetic disk. Disk drives for floppy disks are called floppy drives. Floppy disks are slower to access than hard disks and have less storage capacity. It storage capacity of 1.44 MB but In practical way its size is 1.38 MB

HARD DISK DRIVE (HDD)

HARD DISK (HDD) C: Drive

A magnetic disk on which you can store computer data. Hard disks hold more data and are faster than floppy disks. A hard disk, for example, can store anywhere from 10 to more than 100 gigabytes, whereas most floppies have a maximum storage capacity of 1.4 megabytes.

MOTHERBOARD

MOTHERBOARD
Motherboard is a big circuit board into the computer. It is a very important part of computer. Other computer parts / components attaches with it.

C.P.U. OR SYSTEM UNIT

SYSTEM UNIT OR C.P.U.

C.P.U.
(Central Processing Unit)

C.P.U. stands for center-processing unit is the engine that drives the entire operation. It performs the math calculation and processing million instruction of per second. There are three types of C.P.U. units: -
1. A.L.U. (ARITHMETICAL LOGICAL UNIT): - It does math calculation for entire P.C.
2. C.U. (Control Unit): - It performs on FIFO Method. It executes the commands in que.
3. S.U. / M.U.:- (Secondary Unit/Memory Unit):- There are two type of Memory:-
1 Primary Memory 2. Secondary Memory

1. Primary Memory:- It is self-memory of Computer if this memory is not present with the system so the system cannot do anything. For e.g. ROM & RAM.

1. ROM:- stands for Read Only Memory. You cannot type any fresh information on it. It holds the data on Permanently basis. If the power supply is switched off, your data won’t be lost in Rom case.

2. RAM: - stands for Random Access Memory. It holds the data on temporary basis. If the power supply is switched off, your data will be lost in RAM Case.

2. Secondary Memory: - It is a storage capacity of computer. If this memory is not present with the system then you cannot save any data on the system. For e.g. hard disk, Floppy disk, CD-Rom.

WHAT IS COMPUTER

What is computer?
Computer is an electronics device, which uses for data storage with fastest processing. It is emotionless machine. It is common operating machine particularly uses for education, training and research.