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....Opening from path \# Creatin an Workbook object with an Excel file...file path workbook1 = self . Workbook ( self . dataDir + "Book1.xls"...