Wikisurgery is a free surgical encyclopedia for surgeons and their patients. Contributions in the form of new articles and editing can be made by anyone at anytime anywhere in the world. The content of Wikisurgery is written collaboratively by people from all around the world. This website is a wiki, which means that anyone with access to an Internet-connected computer can edit, correct, or improve information throughout the encyclopedia, simply by clicking the "Edit This Page" link: “Wiki: a type of website that allows users to add, remove, or otherwise edit all content very quickly and easily, sometimes without the need for registration. This ease of interaction and operation makes a wiki an effective tool for collaborative writing.” In every article, links will guide you to associated articles, often with additional information. You are welcome to add further information, cross-references, or citations, so long as you do so within Wikisurgery's editing policies and to an appropriate standard. You do not need to fear accidentally damaging Wikisurgery when you add or improve information, as other Wikisurgeons are always around to advise or correct obvious errors if needed. Wikisurgery uses MediaWiki, encyclopedia software which is carefully designed to allow easy reversal of editorial mistakes. Because Wikisurgery is an ongoing work to which in principle anybody can contribute, it differs from a paper-based reference source in some very important ways. In particular, older articles tend to be more comprehensive and balanced, while newer articles may still contain significant misinformation, unencyclopedic content, or vandalism. Users need to be aware of this in order to obtain valid information and avoid misinformation which has been recently added and not yet removed (see Wikisurgery:Researching with Wikisurgery for more details). However, unlike a paper reference source, Wikisurgery is completely up-to-date, with articles on topical events being created or updated within minutes or hours, rather than months or years for printed encyclopedias.