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....Excel 2007-2013 XLSX XLSM XLSB XLTX SpreadsheetML CVS OpenDocument...Excel XLSM Excel XLSB Excel XLTX Excel XLTM SpreadsheetML Portable...