I guess one is for projects and other groups ........ sorry don't know much 'bout it :(
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There are three major types of software - Programming Software, Systems Software and Application Software. Of the three, the latter two come in two broad classifications - open source and closed source. There are many different types of application software which are open source and most of us regularly download and use them on our PC/laptop, such as VLC. In this Buzzle article, we will take a look at some popular and highly recommended open source software examples for different types of operating systems.

An open source computer software is either a systems software or an application software that is available freely in the form of source codes and the users are permitted, under the software license, to study, modify and improve the software. The Open Source Initiative has set certain parameters to determine whether a software license renders the software open source or not. These parameters are very specific and are as laid down below. In order to be considered Open Source, a software must qualify on all of these parameters