Subject Re: [IB-Conversions] What is a Lytec *.dbp file?
Author Doug Chamberlin
Post date 2006-03-05T20:41:58Z
http://www.webopedia.com/quick_ref/fileextensionsfull.asp

says Btrieve data files are: *.btr Btrieve Database file

Also, I remember .DDF are Btrieve schema/meta-data files.