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....and from XLS, XLSX, XLSM, SpreadsheetML, CSV, Tab Delimited, HTML...and Conversions - XLS, SpreadsheetML (XLSX, XML), Comma Separated...