Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....2007-2013 XLSX XLSM XLSB XLTX SpreadsheetML CVS OpenDocument Open Local...XLSB Excel XLTX Excel XLTM SpreadsheetML Portable Document Format...