http://msmvps.com/blogs/bradley/archive/2008/12/05/okay-so-they-sent-me-a-qby-file-now-what.aspxFile extensions used in QuickBooks: http://support.quickbooks.intuit.com/support/Pages/InProductHelp/Core/QB2K8/ContentPackage/Core/File_Other/info_file_extensions.html Stumbled across a nice web site that lists all the Quickbooks file types that youenCommunityServer 2008.5 SP2 (Build: 40407.4157)