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....( 80 ); //Save the result in XLSX format book . save ( "output...( 80 ); //Save the result in XLSX format book . save ( "output...