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Some of its important features are:
• It has a graphical user interface.
• Free and open source operating system. Anyone with GNU General Public License (GPL) can run, modify and
even sell the software.
• It supports multiuser and multitasking. Several users can run multiple programs or processes simultaneously on
one system.
• It has a hierarchical file system to represent information.
Different variants of Linux are available in the market like Red Hat, Ubuntu, Arch Linux etc.
Brainy Fact
Only 2 out of top 500 Supercomputers run on Windows, 485 are on Linux.
Mobile Operating System
Mobile Operating Systems are designed to run the applications and other programs on smartphones, tablets,
smart watches or other portable devices. It is a combination of an operating system and communication
technology.
Some of the important features are:
• It has a graphical user interface with menus and buttons supporting different types of apps.
• It has a strong multitasking feature.
• It allows a device to easily interact in short distance or long distance communication.
• Some of the commonly used mobile OS are Android, iOS, Windows OS etc.
Android iOS Windows Mobile OS
Types of Operating Systems
There are different types of operating systems. The operating system can be categorised on the basis of control
and application they support. Let us discuss briefly important types of operating systems.
• Single-user Operating System: This type of operating system allow only one user can access the computer
system at a time. The most commonly used single-user operating systems are Palm computer and DOS.
• Multi-user Operating System: In this type of operating system, multiple users can use the computer at the
same time. Examples of multi-user operating systems are Linux, Windows, etc.
• Multi-processor Operating System: A multi-processor operating system has more than one Central Processing
Units (CPUs) to manage the functioning of the computer. All these CPUs are able to communicate with one
another to coordinate operations. This type of operating systems provide higher speed and capable to run
multiple applications at the same time.
ICT Skills-I 67

