File Extension WRK File Format Spreadsheet (Symphony 1.0) WRK stands for Spreadsheet (Symphony 1.0). This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Connecting to a remote DB on a UNIX server with SQL ILE Program won't compile Can I create and copy Microsoft Excel spreadsheets with LotusScript?