operating system

1. An operating system is a collection of
programs that manages and controls the
two major component of a computer
system, i.e., hardware and software.
Hardware in a computer is of no use
without OS.
Different types of operating system
are: Unix, MS-DOS, Mac OS, Windows,
Linux, Palm OS/Pocket PC.

2. INTERNET
It has a non-uniform speed, i.e.,
slow, fast, 3G, 2G, 4G.
It is a service used by a web
browser such as Opera Mini,
Google Chrome, etc.
It is a worldwide system of
computer networks.
It is a public network.
It is a private network.
It has a uniform speed, i.e.,
same speed.
It is a network of networks
such as LAN, WAN.
It is contained within an
enterprise.
INTRANET