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This dust can cause erratic cursor movement or prevent the mouse
from functioning properly. To avoid this, you should regularly
clean the mouse and mouse pad surfaces.
A mechanical mouse uses a rubber ball that makes contact with
internal wheels when it is rolled on a pad or desktop. This type of
mouse is particularly susceptible to dust and particles, which can
accumulate inside and interfere with its tracking and movement.
Mechanical Mouse If the mouse pointer does not move smoothly, you will need to
clean the rubber ball.
Scanner: A scanner is used to input printed pictures and text into a computer. There are
various types of scanners available, and the choice of scanner depends on its intended use.
Some popular types of scanners include:
• Hand-Held Scanner: It is a type of scanner that can be held in
hand and rolled over a flat image or document. It is small in size,
portable, and less expensive.
Hand-Held Scanner
• 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.
Flatbed Scanner
• 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 placed on top and the scanner automatically scans the pages
one by one. It is widely used in offices.
Sheetfed Scanner
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The difference is that a flatbed scanner scans one page at a time on a glass surface, while a
sheet-fed scanner can automatically handle and scan a stack of papers.
Webcam: A webcam is a digital video camera connected to a computer,
allowing you to transmit your image over the Internet. Smaller than traditional
cameras, webcams are typically attached to the computer monitor or built into
the device. They are widely used for video conferencing, online streaming, and
Webcam virtual meetings.
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. Graphic Tablet
Computer—Hardware Components 11

