What are 2 categories of a software?
Software can be categorized as:Closed Source : Source code is not available for general publicOpen Source : Source code is available for general public to seeNote that availability of the source code does not mean that the software is completely free. It is still possible that an Open Source Software is specifically licensed, for example to allow free use but not for free redistribution. On the other hand, it is also possible that a Closed Source Software is allowed to be use and distributed for free.