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.... Windows Forms, Windows Presentation Foundation, Windows Store...XLS, XLSX, XLSM, XLTX/XLTM, HTML, CSV, ODS, Tab Delimited, SpreadsheetML...