නිදහස් මෘදුකාංග ව්යාපාරය
නිදහස් මෘදුකාංග ව්යාපාරය (free software movement) 1983 දී රිචඩ් ස්ටාල්මන් විසින් ගනු ලැබූ වාපෘතිය නිවේදනය සමඟ ආරම්හ විය.මෙම ව්යාපාරයේ අරමුණ වන්නේ පරිගණක පාවිච්චි කරන්නන් අතර නිදමස් හා විවෘත මෘදුකාංග ප්රචලිත කිරීමට හා ආවෘත මෘදුකංවල ඒකාධිකරය පරාජය කිරීමයි.
Most members of the නිදහස් මෘදුකාංග ව්යාපාරය believe that all software should come with the freedoms listed in the free software definition. Many hold that it is immoral to prohibit or prevent people from exercising these freedoms and that these freedoms are required to create a decent society where software users can help each other, and to have control over their use of their computer.
Some adherents to the free software movement do not believe that proprietary මෘදුකාංග is strictly immoral. They argue freedom is valuable (both socially and pragmatically) as a property of software in its own right, separate from technical quality in a narrow sense. Moreover, they may use the term "free software" to distance themselves from claims that "විවෘත මූලාශ්ර" මෘදුකාංග is always technically superior to proprietary software (which is often demonstrably false, at least in the short term). In this sense, they object that "විවෘත- මූලාශ්ර" advocates, by concentrating solely on technical merits, encourage users to sacrifice their freedom (and the long-term benefits thereof) for short-term conveniences that proprietary මෘදුකාංග may provide.
Supporters of විවෘත මූලාශ්ර> argue for the pragmatic virtues of free මෘදුකාංග rather than questions of morality. Their basic disagreement with the නිදහස් මෘදුකාංග පදනම is its blanket condemnation of proprietary software. There are many programmers who enjoy supporting and using free software but make their livings developing proprietary software, and do not consider their actions immoral. The "official" free-software and open-source definitions are slightly different, with the නිදහස්-මෘදුකාංග definition generally considered to be more strict, but the විවෘත මූලාශ්ර licenses which are not considered to be free software licenses are generally obscure, so in practice virtually all open source software may also be considered free software (a notable exception being the Netscape Public License used by Netscape Navigator and Mozilla).
The නිදහස් මෘදුකාංග ව්යාපාරය also believes all software needs free documentation, but does not take a strong position on other types of works. Members of the නිදහස් මෘදුකාංග community advocate works that serve a practical purpose should also be free.