.DAT is a commonly used file extension for saving generic data records. The information contained within a .DAT file depends on the program used to create it, but it will usually be in binary code or ...

A DAT file is a generic data file created by an application. It could be data from your accounting system, your automated PBX, Windows or any other program. DAT files sometimes contain configuration ...

However, things changed with Windows 11/10/8. In Windows 11/10/8, Index.dat files are not used by Internet Explorer 10. The indexing functions are being implemented within a Microsoft database system.

Q. I received e-mail from a relative that says it is in a winmail.dat file. When I try to open the file, I get a message that says something like: "You are attempting to open a dat file. They are used ...