Web interoperability is producing web pages viewable with standard compatible web browsers, various operating systems such as Windows, Macintosh and Linux, and devices such as personal computers (PCs), PDAs and mobile phones based on the latest web standards.
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History
The term was originated by the Web Interoperability Pledge, which is a promise to adhere to current HTML recommendations as promulgated by the World Wide Web Consortium (W3C). The WIP was not a W3C initiative. but it was started by and has been run by ZDNet AnchorDesk quite independently.
This issue was known by cross browsing in browser war between Internet Explorer and Netscape. Windows Internet Explorer was the dominant browser after that, but modern web browsers such as Mozilla Firefox, Opera and Safari have supported web standards. Because of backward compatibility of Internet Explorer, many web pages have supported non-standard HTML tags and DOM handling script yet as well platform-dependent techniques such as ActiveX. These are very harmful for Web accessibility and device independence.
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Activities
It has been various activities, for example Web Standards Project, Mozilla's Technology Evangelism and Web Standards Group. Also there are educational activities such as Web Essential Conference.