Hello,
Does anyone know how to open old data base files with the extensions .dba, .dbb, .dbc, ..., .dbo ?
It will greatly help me if you could answer to my question.
I precise that this files are about 15 or 20 years old and i have absolutly no documentations on them.
Thanks.

I would suggesting using notepad or a hex editor to view them, to get an idea as to the type of format/layout. When you know more about the data, you can possibly come up with a data conversion approach.