Calculating the True Price of Software

Therefore, the major difference in worldview between open source advocates and proprietary software license advocates is explainable as a differing opinion on the correct value of the volatility of maintenance and upgrade pricing. People who believe that the pricing on maintenance is stable and unlikely to change see greater intrinsic value in the software. People who fear that the pricing is subject to large fluctuations see no intrinsic value in the up-front license; stripped of the options, the license value approaches $0.

Lefkowitz, Robert. O'Reilly and Associates (2005). Articles>Technology>Software>Open Source

Understanding Open Source, Part 1  

Open source software is big news right now. We've heard from big-name corporations who support it and oppose it. A number of high-profile intellectual property battles concern it. You probably know an open source zealot who's spent some time extolling its virtues. Open source software is a good thing, and has an important place in the tech sector. Closed source software also has its place, and the industry will benefit most from cooperation between the two.

Feldman, David. KMworld (2006). Articles>Technology>Software>Open Source