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....1997-2003 XLS Excel 2007-2013 XLSX XLSM XLSB XLTX SpreadsheetML...:// example . com / Sample . xlsx How it works? Instantiate during...