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....( "A1" ); //Save the result on disc book . save ( dir + "output...loadOptions ); //Save the spreadsheet on disc book . save ( dir + "output...