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....Represents an Excel 97 - 2003 file Xlsx Represents an Excel 2007/2010/2013/2016/2019...2007/2010/2013/2016/2019 and Office 365 XLSX file Xlsm Represents an Excel...