CBSE Notes for Open Source Concepts Class 12 Notes
You all have worked on various types of Software like Operating System (Windows XP, Windows 7 etc.) , Office Suits (MS Office, Lotus etc.) and Computer Games Software etc.You cannot change their features because they all are Proprietary Software i.e. they are intellectual property of any developer or organization and source code is also not given.But some Software comes with their source code and allows us to make any type of change without taking permission of the developer. These categories of software are called Open Source Software (OSS). Please refer Open Source Concepts Class 12 Notes for more revision notes.
CBSE Revision Notes 