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 and Book2.xls. The files contain formatted...path . join ( dataDir , "book1.xls" ); files [ 1 ] = path . join...