FUNCTIONS PERFORMED BY AN INPUT DEVICE |Baisc Computer Learn Online From Beginner"

FUNCTIONS PERFORMED BY AN INPUT DEVICE

Following are the functions performed by the input unit: 

• 1.  It accepts (or reads) the list of instructions and data from the outside world. 
• 2.  It converts these instructions and data in computer acceptable form. 
• 3.  It  supplies  the  converted  instructions  and  data  to  the  computer  system  for  further processing. 

TYPES OF INPUT DEVICES 

Mainly we can divide the input devices into two categories: 

• 1.  Standard input devices 
• 2.  Nonstandard input devices 

STANDARD INPUT DEVICES 

Following two devices are considered as the standard input devices because  these are the 

most probably found input devices with most of the computers: 

• 1.  Keyboard 
• 2.  Mouse 

NON-STANDARD INPUT DEVICES 

Input devices other than “Standard Input devices” are considered as the non-standard input 

devices. Following are the examples of some non-standard input devices: 

• 1.  Scanner 
• 2.  Joystick
• 3.  Light Pen 
• 4.  Digitizing Tablet 
• 5.  Hand Tracker 
• 6.  Track Ball 
• 7.  Track Points 
• 8.  Track Pads 
• 9.  Speech Recognition System i.e. Microphone 
• 10.  Vision Input System i.e. Digital Camera etc.