Robles, G.Steinmacher, I.Adams, P.Treude, C.2020-01-232020-01-232019IEEE Software, 2019; 36(6):12-150740-74591937-4194http://hdl.handle.net/2440/122874Open source software (OSS) has conquered the software world. You can see it nearly everywhere, from Internet infrastructure to mobile phones to the desktop. In addition to that, although many OSS practices were viewed with skepticism 20 years ago, several have become mainstream in software engineering today: from development tools such as Git to practices such as modern code reviews.en© 2019 IEEETwenty years of open source software: from skepticism to mainstreamJournal article100000427710.1109/MS.2019.29336720004929946000032-s2.0-85074209734504016Treude, C. [0000-0002-6919-2149]