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....quickstart / ' workbook = Workbook () sheet = workbook . getWorksheets...file_format_type = FileFormatType workbook . save ( dataDir + "HelloWorld...