Open Source - Software
The concept of open source, as it applies to software, is extremely simple. When software code can be freely distributed and modified by other programmers, the software evolves and improves. This is the guiding idea of a new type of software that has been gaining lots of group, especially since the Internet has gained in popularity in recent years.
More information on open source and some of the software that is available in this system can be found at the www.opensource.org.