IE10 Packs IE9, IE8, IE7, and IE5 Rendering Modes
Internet Explorer 10 can seamlessly “go back in time” and render websites as if it was one of its predecessors, such as IE5, IE7, IE8, IE9.Not that this is anything new when it comes down to major IE iterations. Microsoft remains committed to supporting legacy websites with new versions of IE just as it still supports legacy applications with fresh Windows releases.Of course, while the IE team has always acted on a mantra of not breaking the web with new IE releases, but packing multiple rendering modes into the browser
