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....//Instantiate a Workbook object by **Excel** file path $workbook = new...new Workbook ( $dataDir . "Book1.xls" ); //Retrieve a list of all...