Any data or instruction entered into the computer is
known as INPUT.
An input device helps you to communicate with the
To enter information and issue commands, you use input
Examples of input devices:
Digital Camera and Web Camera
The keyboard is the most common and widely used
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
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 bottom of a mouse is flat and contains a
mechanism that detects the movement of a mouse.
Mouse in which the ball is replaced by an optical system (light-
emitting diode and sensor); it has no movable parts.
Mechanical or optical mouse that contains a scroll wheel.
Mechanical or optical mouse connected to the computer by
infrared or radio signals.
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
bar code reader
Device that uses an optical scanning process to decode
information contained in bar codes.
Equipment that converts a document’s graphics or texts
into digital data.
Device that converts electric pulses into broadcast or
A microphone allows you to record your voice to the
It also lets you speak to other people using computers
or even on the telephone.
A microphone is also called a mic.
Miniature digital camera used to transmit video images
in real time or for videoconferencing over the Internet.
Portable video camera in which the recording tape is
replaced by a processor, which records and stores
sounds and images in digital format.
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.