Question

list any five operating system existing in India

Answer 1

Windows
Ios
LinUx
Unix
Android

Answer 2

Everybody who would like to know whether an operating system with a certain name really exists or just like to explore all names, this is an excellent place to start with. You will find all types and derivatives of operating systems: commercial, free, open source and closed source. This list does not distinct between the recent stage of development, application purpose, distribution or hardware platform. Operating systems with different version numbers are only considered if they are technically clearly different to each other. 

This list offers hundreds of operating system product and project names, many of them are based on the same operating system with more or less differences in the source code. The most operating systems can be traced down to few development lines and derive from a small amount of system software. This applies especially to Linux distributions with a low number of main distribution