Analogue and Digital data

Computer system work with Digital data. In a digital system every unit of information is reduce to a combinations of bits. Each bit can have one of two valuves: ON or Off.


Many data transmission media use analogue transmitions. An analogue transmition uses variatoin in a signal wave to represent data. When someone speak to you, you hear a sound wave and interpret the data as word depending on the variations in tone and pitch.


Therefor many computer device include componnents to convert data between analogue and digital formats. For a example  a high point of wave might represent On the low point Off. Example of componnents that convert between analogue and digital include the sound adapter and a computer modem.