Open Source Is a Continual Bugfixing by a Few

Github is one of the most popular repository sites. It is a place where contributors come together to share code, ideas, thoughts and report issues. By using topic modelling applied to comments we are able to mine plentiful interesting information. Three aspects of an open source project mostly attracted our attention: the existence of a ”Core Team’” - small number of developers that have the most contributions, the prevailing popularity of topics related to bug fixing and the continuous development of project without significant iteration phases.