Many people know Wikipedia, a great source of information that I frequently use. Almost all the information that I need and that could be written is there.

Wikipedia is developed with an application called Wiki. The Wiki is a system that let us have a collaborative website so every user can create and edit content there. The application saves the information and stores the older version of it, so you can have all the tracking of every piece of data there.

In big companies people uses Wiki as a documental tool for grab information about all their processes, systems, marketing and other useful data. Their employees write in the wiki all these information so, for instance, they quickly know how to answer a special type or email, or how to proceed to install a software, etc.
In small endeavors, people also use wikis following the same goal: documenting. The next video, shows in a very simple way, why wikis are so useful. Enjoy it!.