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 CDR

CDR is a file extension used by CorelDraw application. CorelDraw is a well-known vector editing software. Its initial version was released in January 1989 for Windows 2.0 and since then more than 20 versions of CorelDraw were released. At this time CorelDraw is available in desktop versions for Windows and Mac OS operating systems.

File Extension PSD

PSD is a file extension used by Adobe Photoshop to store its graphics files. Adobe Photoshop is a de-facto standard in a raster image editing software. First version of Photoshop was developed in 1988 by Thomas and John Knoll. It was subsequently sold to Adobe Systems which owned it since then.

File Extension AI

AI file extension is used by files produced by Adobe Illustrator. AI is a vector image format which means it stores graphics information as a set of geometrical figures with their coordinates, sizes and transformations.

File Extension BIN

The .BIN/.CUE image file format was developed by Jeff Arnold for the CDRWIN program. An image consists of two files which contain binary data and metadata, respectively. The filenames typically match (e.g. image.bin and image.cue). The .BIN file contains an exact copy of all data stored on an optical disc in raw, unprocessed form but without any subchannel data. For this reason, some programs use the .RAW suffix for these 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


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