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....EXCEL_97_TO_2003 ) \ # Save in Excel2007 xlsx format workbook . save ( data_dir..."Book1.xls" , file_format_type . XLSX ) \ # Save in SpreadsheetML...