CIW, short for Certified Internet Webmaster, is offered by Prosoft Systems. The certification is available in various levels, including Associate, Professional and Expert levels. The associate level cert is called CIWA (Certified Internet webmaster Associate) and is a widely known certificate in the area of web design and development using html, xhtml, CSS, XML, XLS, and XLST. CIW skill areas include Web Foundation Series, Web & Mobile Design Series, Web Development Series, and Web Security Series. Check out the article for more information.