The main difference between FOSS and proprietary software resides in the license under which it is made available. FOSS is developed in an open manner in which the end users of the software are able to participate. They may participate by answering the questions of other end users. They can also contribute to the documentation of the software and its use.
According to OSI , The basic idea behind open source is "When programmers can read, redistribute, and modify the source code for a piece of software, the software evolves. People improve it, people adapt it, people fix bugs. And this can happen at a speed that, if one is used to the slow pace of conventional software development, seems astonishing". The OSI is focused on the technical values of making powerful, reliable software, and is more business-friendly than the FSF.
According to Free Software Foundation (FSF), Free software is a matter of the users freedom to run, copy, distribute, study, change and improve the software. More precisely, it means that the program's users have the four essential freedoms:
The popular myth surrounding Free/Open Source Software is that it is always "free" - that is, "free of charge". To a certain degree this is true. No true FOSS application charges a licensing fee for usage. Most FOSS distributions (Red Hat, SuSE, Debian, etc.) can be obtained at no charge off the Internet. On a licensing cost basis, FOSS applications are almost always cheaper than proprietary software. However, licensing costs are not the only costs of a software package or infrastructure.
FOSS stands for 'Free and Open Source Software. FOSS allows an individual the freedom and right to use software licensed under an open source agreement. The individual may use the software as it is or may make changes as needed.