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◦ Flatbed Scanner: It is a type of scanner that uses a flat glass surface for
scanning documents. It looks like a photostat machine. Unlike a hand-held
scanner, a flatbed scanner does not require movement of the document.
• Sheetfed Scanner: It is a type of scanner that allows multiple papers to be
scanned at a time. In this type of scanner, the stack of papers is kept on top
and the scanner automatically scans each page one by one. It is widely used
in offices to scan documents.
Info Byte
The difference between a Flatbed scanner and a Sheetfed scanner is that a Flatbed
scanner scans one page at a time on a glass surface, while a Sheetfed scanner can
automatically handle and scan a stack of papers.
• Webcam: It is a type of video camera that saves images or visuals in realtime
into a computer via USB, ethernet or Wi-Fi. Web camera is used to create
video links and helps us to set up authentic video conference stations. Some
built-in webcams can be remotely activated from far off locations. Webcams
can also be used for security & surveillance purposes by monitoring the captured visuals. It is
smaller than the traditional camera and is generally attached to the monitor of the computer
or built into the hardware.
• Graphic Tablet: It allows you to directly draw on a computer screen. The
device consists of a flat surface upon which you can draw with an attached
stylus, that looks like a pen.
• Joystick: It is a pointing device similar to a mouse, but unlike a mouse, where the
pointer stops moving when the device is no longer moved, a joystick’s pointer
continues to move in the direction the joystick is pointed until it is returned to
the neutral position.
To stop the pointer, the user has to bring the joystick to its upright position. It is generally
used to play video games.
• Microphone: It is a voice based input device. With the help of this device, sound
or voice is recognized/recorded in the computer and is converted into digital
form which is then played or processed by the computer.
Output Devices
Output is the information obtained after processing of data. The user receives the result through
output devices. Output can be in the form of soft copy or hard copy. Soft copy refers to the
digital copy which lies in the storage device where as hard copy refers to the printed contents on
a paper or film. Some of the output devices are:
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iPlus (Ver. 2.1)-VII

