SharePoint 2010 introduces a new UI that is a clear and welcome departure from the outdated UI supplied by SharePoint Server 2007. The new SharePoint 2010 UI leaves behind the unnecessary postbacks, the confusing page transitions, and the table-based page layouts of SharePoint 2007. The result is a much improved user experience with a server-side Ribbon and a wealth of new client-side behavior that's able to execute many users' commands behind the scenes using asynchronous callbacks to the Web server.
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