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•    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.





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