Open source is the way that network user open up their software of source programs to the others for free so that he or she can find defects or bugs. Most of people follow the traits of GPL with is general public license but there are traits which help people to create open source by individual. I personally think open source is really revolutionary work since with cheaper way people can develop high quality of software. Furthermore, sharing the software with others and find the defects will help the owner to get more information from many people, leading him or she to make a better one.