.dat can mean many things. data of any type quite often ends up with these extensions. How about using the app that created them? You can also try viewing them in notepad.

If you been using Windows OS for a long time, you may have come across a file with name NTUSER.DAT. It is a user-specific file that keeps user configuration data that is read when you log in to your ...

A file that contains RTF format codes in order to support rich text in email messages. WINMAIL.DAT is a UUencoded file that is sent from a Microsoft Outlook or Exchange email client. If the recipient ...

I would like to know is there a way to take a dat file and log file from one sql server and import that file to anther server. For example a customer has a dat file and log file on a cd rom and I want ...