Open source is a term used for software that opens or frees its source code to be seen by its users, and lets its users see how the software works and users can also improve or improve the software for the better.
- Advantages of Open Source
Advantages of open source software that can be obtained for free without having to pay software license. And usually open source software can be obtained on the internet, one of the famous open source software that is the Linux computer operating system.
Open source software is highly supported by the Internet, initially open source downloaded from the internet and then used by people who use it and can be repaired or developed again if there is a lack of software. And the result of the development of the software will be published to the internet again, and can be used by the crowd. At this very easy time to get open source software on the internet.

Types of open source applications
Certainly in the development of open source software involves a lot of people from different parts of the world, who interact through the virtual world or Internet network. So as the development of more and more technology popping a variety of software made based on open source that is uploaded to the internet. This open source pattern has generated a very reliable develover.
Free software or free software that is based on open source is not a scheming program, do not mind that if the free software is not good quality. Because it has been proven greatness and reliability of open source software. Because the free software based on open source has many through the process of continuous improvement so that the softwer will be more perfect.
- Contoh Software Open source
Here are some examples of popular open source software, such as below:
- Linux, is a free and very popular operating system software.
- XAMPP is a useful software package for web simulation and development, including Apache and MySQL (database).
- Mozilla Firefox, is a useful software to browse web pages on the internet.
- OpenOffice, is a useful office software package for word processing, tables and databases.
- osCommerce, is a web application software used for online stores.
- ClamAV & ClamWin, is an antivirus software.
- Audacity, is a recording software as well as audio processor.
- GIMP, is a photo processing software and also digital images.
- VideoLAN, is a multimedia file player software.
- Blender, is a program for modeling 3 (three) dimensions, such as animation and games.
- Filezilla, is a network softwere that works for file transfer via FTP protocol on computer network or internet network.
- Mplayer, is an open source music player software.
Thus the discussion of the notion of open source and hopefully this paper can be useful.