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....print "open $ok\n" ; my $worksheets = $workbook -> getWorksheets...print "worksheets $ok\n" ; my $worksheet = $worksheets -> get...