Than to open dat?
The very word "data" in English means "data". It's easy to guess that dat is an abbreviation for this word, and the meaning can be treated as a "data file". What kind of data does not matter, since it is not indicated.
Indeed, the data itself can be absolutelyany, their structure and type are determined only by the application that uses them (or created). These files, unfortunately, are not intended for their direct use by the end user, but are official.
Than to open dat a file: programs
Having discovered a dat extension from the file, than opening it? Evaluate the file size (context menu (right click on the file) - "Properties"). If it approaches the size of the CD image (about 700 megabytes), then, most likely, we have an obsolete video format - VCD Video File. How to open a dat masking VCD? To do this, use any media player installed on your computer. Great, if you have installed K-lite Mega Codec Pack - the best, in our opinion, a set of codecs. This will give a guarantee of launch.
If you open a file with the extension.dat failed, most likely, it is used by another program. And to determine which one is difficult, it can be all in the range of unpretentious text editors (AkelPad) and ending with powerful software packages or games (3DsMax / Photoshop / Crysis 2 / Rage).
The only thing that can help us understand thanopen the dat extension in this case, - the file address. Call the context menu of the file, and in the "Location" line read from the right to the left, thus rising in the folder tree. After learning which application requires this dat-file, you can find a way to "unzip" it.
Often to open dat, and even more so, to modify it is prohibited by the rights of the publisher of the program and is prosecuted by law. Be reasonable!