.mdb - Microsoft Access database
.mdf - Microsoft SQL Server primary datafile
.accdb - Office Access 2007 database file format
.rem - ACT! database maintenance file
.sqlite - Mozilla Firefox file
.nsf - Lotus Notes database file
.fdb - Database file
.ldb - MS Access Record-Locking Information
file extension PDT - ProCite database
File extension PDT description:
Database file. Probably old file extension or not supported application.
