Excel service

http://blogs.msdn.com/b/cumgranosalis/archive/2009/11/25/using-the-web-services-apis-to-open-a-workbook-for-editing-and-set-calculation-options.aspx

http://www.learningsharepoint.com/2010/07/11/programatically-openeditsave-excel-workbook-in-sharepoint-2010/

http://blogs.msdn.com/b/cumgranosalis/archive/2009/11/25/using-the-web-services-apis-to-open-a-workbook-for-editing-and-set-calculation-options.aspx

https://msdn.microsoft.com/en-us/library/office/ff640648%28v=office.14%29.aspx