A W3C Working Group Note explaining how CAPTCHAs can present a major obstacle to users who have limited vision or a learning disability such as dyslexia. This document examines a number of potential solutions and alternative systems.
International industry consortium founded in 1994 whose purpose is to develop specifications, guidelines, software, and tools to promote the Internet's evolution and ensure its interoperability.
W3C specification that allows a style sheet to be associated with an XML document by including one or more processing instructions with a target of xml-stylesheet in the document's prolog. (W3C Recommendation 29 June 1999)