Wikipedia is a free online encyclopedia that allows anyone to edit its articles. It contains over 270 language editions and was founded in 2001 as an offshoot of Nupedia. Wikipedia appeals to students and others as a starting point for research due to its wide range of general and detailed information on various topics. While free editing allows factual errors to be quickly corrected, it also opens the possibility of non-factual information being posted. Wikipedia utilizes various applications and features like discussion pages and tabs to facilitate collaborative editing and improve the user experience.