W3 Schools|World Wide Web

WWW. means World Wide Web

W3 Schools is a web developer's portal, with tutorials and references relating to web development subjects, including HTML, XML, CSS, JavaScript, PHP, and SQL. W3Schools is free of charge, and is funded through text and display advertising.The tutorials and references on the website and the related code are proprietary.The site derives its name from the abbreviation for the World Wide Web.
It is created and owned by Refsnes Data, a Norwegian family-owned software development and consulting company.