Page 13 - iPro_trackGPT_V5_Class7
P. 13
• Control keys: (Ctrl, Alt, Esc, etc.)
• Function keys: (F1-F12)
• Special keys: (Caps Lock, Backspace, Spacebar, Arrow keys, Home, End, etc.)
• Punctuation keys: Comma (,), Hyphen (-), Semicolon (;), etc.
Mouse: A mouse is a pointing device that enables you to input
data into a computer through point, click, and drag-and-drop
commands. It controls the movement of the pointer on the screen
and is used to navigate and select icons, files, and folders. There are
two main types of mouse: optical and mechanical.
An advanced pointing device, the optical mouse uses a Light-
Emitting Diode (LED) and an optical sensor. This type of mouse does
not require internal cleaning since it lacks moving parts. However, dust accumulation near the
light emitter can cause erratic cursor movement or prevent the mouse from working. Regular
cleaning of the mouse surface and mouse pad is necessary to prevent dust buildup.
A mechanical mouse uses a rubber ball that makes contact with
internal wheels as it rolls on a pad. Mechanical mice are prone to
dust and particle accumulation inside, which can hinder smooth
tracking and movement. If the mouse pointer does not move
smoothly, cleaning the rubber ball and internal components is
necessary.
Scanner: A scanner is a device that inputs printed pictures and text into the computer by
digitising them. Various types of scanners are available, each suited for different purposes.
Some popular types of scanners include:
• Hand-Held Scanner: This portable and cost-effective scanner can
be held in hand and rolled over a flat image or document to scan
it into digital form. Due to its small size, it is easy to carry and use.
• Flatbed Scanner: Resembling a photocopier, a flatbed scanner
uses a flat glass surface to scan documents. Unlike a hand-held
scanner, it does not require manual movement over the document.
• Sheetfed Scanner: Ideal for office use, this scanner allows multiple
pages to be scanned at once. A stack of papers is placed in the
feeder, and the scanner automatically feeds and scans each page
individually. This type of scanner is efficient for handling large
volumes of documents.
Computer—Hardware Components 11

