Sabbir Hossain

I.D No: 13087455

B.B.A 2nd Year 1st Semester

Department Of Marketing

University Of Rajshahi

TOPIC

Input Devices

WHAT IS INPUT? Any data or instruction entered into the computer is known as INPUT.

An input device helps you to communicate with the computer.

To enter information and issue commands, you use input devices.

Examples of input devices:

Keyboard

Mouse

Scanner

Microphone

Digital Camera and Web Camera

Joystick

KEYBOARD The keyboard is the most common and widely used input device. It is made up of buttons called 'keys'. The keys are arranged into

sections:

• Alphabet keys • Function or F keys (F1, F2, F3) • Numeric keys (one set above the alphabet keys and a numeric keypad on the right) • Arrow keys •Command keys (insert, delete, home, end, page up/down)

IMAGE OF KEYBOARD

MOUSE• A mouse is an input devices that fits comfortably under the palm of your hand.

• A mouse is a pointing device.

• We use mouse to control the movement of the mouse pointer on the screen and to make selections from the screen.

• The bottom of a mouse is flat and contains a mechanism that detects the movement of a mouse.

TYPES OF MOUSE

Optical mouse Mouse in which the ball is replaced by an optical system (light-emitting

diode and sensor); it has no movable parts.

Wheel mouse Mechanical or optical mouse that contains a scroll wheel.

Cordless mouse Mechanical or optical mouse connected to the computer by infrared or

radio signals.

IMAGE OF MOUSE

SCANNER• A scanner is a light-sensing input device that reads printed text and graphics and then

translates the results into a form the computer can use.

• The image or text can be saved or changed on the computer.

TYPES OF SCANNER• Bar code reader

• Device that uses an optical scanning process to decode information contained in bar codes.

• Optical scanner

• Equipment that converts a document’s graphics or texts into digital data.

IMAGES OF SCANNER

Optical scanner Bar code reader

MICROPHONE• Microphone

• Device that converts electric pulses into broadcast or recorded sounds.

• A microphone allows you to record your voice to the computer.

• It also lets you speak to other people using computers or even on the telephone.

• A microphone is also called a mic.

PICTURE OF A MICROPHONE

JOYSTICK

• A joystick is a pointing device that works on the principle of trackball

• To make the movement of the spherical ball easier, it is placed in a socket with a

stick mounted on it

• On most joysticks, a button on the top is provided to select the option currently

pointed to by the cursor

• Commonly used for controlling player movements in video or computer games

VARIOUS TYPES OF JOYSTICK

DIGITAL CAMERA, CAMCODOR AND WEB CAMERA

Web camera Miniature digital camera used to transmit video images in real time or for

videoconferencing over the Internet. Digital camcorder

Portable video camera in which the recording tape is replaced by a processor, which records and stores sounds and images in digital format.

Digital camera Camera that contains a sensor and a microprocessor rather than film; it records and

stores images in digital form, which can then be viewed on a screen.

Picture Of Digital Camera, Camcodor And Web Camera

Thank You