"According to Microsoft's corporate vice president in charge of IE, Dean Hachamovitch said, the IE10 platform preview means that developers can start working with several "site-ready" HTML5 technologies. Like so many others, Microsoft uses HTML5 as an umbrella term that applies not-only to the still gestating HTML5 standard but also other standards such as JavaScript and CSS. The IE10 platform preview offers support for CSS3 Positioned Floats, HTML5 Drag-drop, File Reader API, and Media Query Listeners and initial support for HTML5 Forms. Microsoft has also added support for an HTML5 sandbox for iframe isolation..."