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....xls" ); $worksheets = $workbook ->...-> save ( $dataDir . "output.xls" , $filesFormatType -> EXCEL_97_TO_2003...