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.... new ( data_dir + 'Book1.xls' ) Opening...'com.aspose.cells.Workbook' ) . new ( fstream ) Saving Files in Ruby...