I have several old databases that I am trying to connect to. The extensions DAT DOC FOR LYR SRT YBL appear for all db file names. I don't know if all are required to browse data. In notepad I see all item numbers once at the top and once again at the end of the file with more data for it. Some data is binary and other are text.
If anyone would like a set of files let me know, otherwise what the heck is it. I know the programmer wrote in Cobol. It is from a very old DOS app.