Generic data file created by a specific application; typically accessed only by the application that created the file; may contain data in text or binary format; text-based DAT files can be viewed in a text editor.
Type: Misc Files
Acronym: Exchange E-mail Attachment
Opens With: Microsoft Outlook 2010, Kupon.BG Klammer
Winmail.dat files contain formatting information for Rich Text (RTF) messages sent from Microsoft Exchange Server; they are added to the end of e-mails when a recipient's e-mail client does not support RTF messages; the Winmail.dat file is not useful to users that do not use Outlook or Exchange Server to retrieve their mail.
Type: Video Files
Acronym: VCD Video File
Opens With: VCDGear, VideoLAN VLC media player
Video stream from a Video CD (VCD) disc; typically saved in MPEG-1 or MPEG-2 format; contains the actual video data that is played from the VCD.
NOTE: Video CD players should play the video from the DAT files without having to open the files manually.
Type: Game Files
Acronym: SimCity 4 Game Data File
Opens With: Electronic Arts SimCity 4
Game package file used by SimCity 4, a city building simulation game; may contain several types of game data files, including .SC4MODEL, .SC4LOT, and .SC4DESC files; used for packaging files into usable content for the game.
SimCity 4 DAT files can be browsed using iLives Reader or DataGen (developed by DarkMatter).
Type: Game Files
Acronym: Minecraft Data File
Opens With: Mojang Minecraft, Mojang Minecraft Server
Data file used by Minecraft, a single and multiplayer block construction game; saved in a compressed GZip format and saves world information, including environmental conditions, player health, inventory items, and player map positions; used for saving the world state as well as tracking multiplayer progress on the server.
Minecraft DAT files may also store level "chunks," which have a 16 x 16 x 128 map dimension and are loaded on-demand as a player navigates through the world.
Minecraft is a first-person perspective game where players construct and destroy blocks and avoid monsters in a 3D environment. Minecraft server is a Java program that runs as a command-line interface.
NOTE: Minecraft DAT files have used different formats over incremental releases of the game. Therefore, one DAT file from one version of the game may not be compatible with another version.
Type: System Files
Acronym: Windows Help File
File used by the Microsoft Windows registry component; contains data for the system or user-level registry, such as passwords, account settings, or file associations; can be loaded into specific parts of the registry when a user logs into Windows.
A common registry hive file is NTUSER.DAT, which stores the user-level registry information. It is located in the C:\Users\[user]\ directory. Another common DAT file is SCHEMA.DAT, which is a registry backup and restore file that is located in the C:\Windows\System32\SMI\Store\Machine\ directory.