Introduction of Operating System
                     Introduction of Operating System
What is an Operating System?
• An Operating System (OS) is a software that acts as an interface between computer 
hardware components and the user. 
• Every computer system must have at least one operating system to run other 
programs.
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Communicate with the computer 
• The OS helps you to communicate with the 
computer without knowing how to speak the 
computer's language. 
• It is not possible for the user to use any 
computer or mobile device without having 
an operating system.
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History Of OS
• Operating systems were first developed in the late 1950s to manage tape storage
• The General Motors Research Lab implemented the first OS in the early 1950s for 
their IBM 701
• In the mid-1960s, operating systems started to use disks
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Examples of Operating System
OS Name Share
Windows 40.34
Android 37.95
iOS 15.44
Mac OS 4.34
Linux 0.95
Chrome OS 0.14
Windows Phone OS 0.06
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Types of Operating System (OS)
• Following are the popular types of Operating System:
– Batch Operating System
– Multitasking/Time Sharing OS
– Multiprocessing OS
– Real Time OS
– Distributed OS
– Network OS
– Mobile OS
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Batch Operating System
• Some computer processes are very lengthy and time-consuming. To speed the same 
process, a job with a similar type of needs are batched together and run as a group.
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Multi-Tasking/Time-sharing Operating systems
• Time-sharing operating system enables people located at a different terminal(shell) to 
use a single computer system at the same time. 
• The processor time (CPU) which is shared among multiple users is termed as time 
sharing.
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Real time OS
• A real time operating system time interval to process and respond to inputs is very 
small. Examples: Military Software Systems, Space Software Systems are the Real 
time OS example.
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Distributed Operating System
• Distributed systems use many processors located in different machines to provide 
very fast computation to its users.
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Network Operating System
• Network Operating System runs on a server. It provides the capability to serve to 
manage data, user, groups, security, application, and other networking functions.
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Mobile OS
• Mobile operating systems are those OS which is especially that are designed to 
power smartphones, tablets, and wearables devices.
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