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....rendering Excel files (XLS, XLSX, XLSB, CSV, ODS, SpreadsheetML, etc...and saving XLS, XLSX, XLSM, XLSB, ODS, XML (SpreadsheetML), CSV...