System

System
A system is an assembly of interconnected (wired)
circuits packaged in a proper housing to realise a
certain function useful for a customer respectively
user.
computer
television set
mobile phone
RADAR, SONAR
. . .
To describe a system a so-called manual is prepared. It
also informs the user how to use it: What happens
when a certain button is pressed? Its function is often
illustrated by a block diagram.