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Wikis can be used for group co-ordination to collect information on a topic. Anyone can change what appears on the page, although there may be a requirement to register and this may involve the reading of a Captcha – image with a series of muddled letters or numbers. There may be no alternative to the Captcha, which can make it impossible for those who use screen readers to access the wiki. 

Wikis use online editors, which are generally similar to word processors, and allow the user to make or edit a web page without having any knowledge of how to develop web content. Users can make multiple changes to the page, which then replaces the previous version and makes the updated site available for other users to see and edit.  The content in wikis can be made very accessible to all users and these applications should be an ideal way to set up a method for collaborative working.


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