IE11's Enterprise Mode (basically IT-managed IE8-frame)
Enterprise Mode for Internet Explorer 11, [...] provides better compatibility for older versions of Internet Explorer and tools to manage which Web apps use it. Businesses can benefit from the modern web standards, better performance, and increased security of our latest browser, while extending existing investments in legacy web apps. [...] Businesses can benefit from the modern Web standards, better performance, and increased security of our latest browser, while extending existing investments in legacy Web apps. http://blogs.msdn.com/b/ie/archive/2014/04/02/stay-up-to-date-with-enterprise-mode-for-internet-explorer-11.aspx