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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 on the document.
• Sheetfed Scanner: It is a type of scanner that allows multiple papers to be
scanned at a time. In this scanner, the stack of papers is kept on top and the
scanner automatically scans the pages 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 Sheetfed
scanner allows you to scan a stack of papers while a Flatbed scanner deals with one
paper at a time.
• 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 whose function is similar to a mouse, except that
a mouse pointer stops moving on the screen as soon as the user stops moving
it, while in the joystick pointer continues to move in the direction towards which
the joystick has been pointed.
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.
• Touchscreen: A touchscreen is a screen sensitive to touch. We can interact
with a computer by touching areas on the screen. Tablets, smartphones,
and ATMs have touchscreens.
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iPlus (Ver. 2.0)-VII

