Though DAT files, which house data as the shortened name implies, are usually best left alone, here's how you can open them.

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 ...

SAS data files are of the type DATA. Note: In the SAS System, the term "data set" is used to refer to both SAS data files, which contain data and data set descriptor information, and to SAS data views ...