BAK File Extension

File extension BAK is given to files used for backup of another document, often created automatically by various programs or the operating system; for example, Windows may create BAK files for the System.ini and Win.ini files.

BUP File Extension

BUP (Back UP) is the filename extension of some files stored on video DVDs. The BUP file is a backup of the IFO file on a DVD, which contains the information about the organization of tracks, menus, chapters, subtitles on the disc. The BUP files are used in the event that the corresponding IFO file is unreadable, perhaps due to a scratch on the surface of the disc.

SYS File Extension

In MS-DOS and DOS-based operating systems, these files can be used as configuration files for the operating system. The MSDOS.SYS and CONFIG.SYS files contain various configuration options. SYS files are also could be used as device drivers

File Extension RAR

In computing, RAR is a proprietary file format for data compression and archiving, developed by Eugene Roshal (hence the name RAR: Roshal ARchive). The filename extension used by RAR is .rar. If a RAR-archive is broken into many smaller files (a multi-volume archive), as is often the case when it was distributed on Usenet, then those smaller files carry the extensions .rar, .r00, .r01, .r02 etc. and most unrar programs reconstruct the whole archive when provided with the .rar file.

KEY File Extension

KEY file extension is used by software licensing libraries. Information about encrypted application license keys could be store there. Typically these files could be read only by software which created them.

File Extension EXE

EXE is a file format of windows executable file. All executable files in Windows operating system are store in EXE format. Be careful when running EXE files receivied from unverified source since they can contain viruses

What is DBF

DBF file extension is used by dBase software to store databases. Also FoxPro software stores tables in DBF format.

File Extension P7M

A file with the extension .p7m (digitally encrypted message) stores encrypted e-mail message. P7M contains both the messages and any attachments in it. Encrypted P7M files are used to prevent unauthorized access to e-mails


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