how computers work

how computers work

1. input devices

   • keyboard
     • for the input of text and characters and also to control the operation of a computer
   • mouse
     • a pointing device by detecting a two dimensional motion relative to its supporting surface
   • scanner
     • a device that analyses images, printed text, or handwriting, or an object and converts it to digital image

2. output devices

   • Monitor
     • It is a video display screen and the hard shell that holds it.
   • Printer
     • It is an external hardware device responsible for generating a hard copy of data. It is commonly used to generating texts, photos, images etc
   • Speaker
     • It is a hardware device connected to a computer’s sound card that outputs sound generated from the card