.CAT File Extension

.CAT File Extension

File Type 1

Windows Catalog File

Developer Microsoft
Popularity
3.6  |  43 Votes
Category System Files
Format Binary

What is a CAT file?

File used by the Windows operating system; specifies that a group of files are from a verifiable source; used for security purposes and contains a digital signature, the catalog version, and an effective date; often used for verifying new software update files.

More Information

Windows catalog files help to suppress multiple trust dialog popups for new software component downloads. Since CAT files can identify a trusted source, the user can choose to "Always trust content" from the software distributor. Then, future downloads from the software distributor that use a CAT file are trusted and do not require a trust popup window.

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Programs that open CAT files

Windows
Updated November 18, 2011
File Type 2

Advanced Disk Catalog Database

Developer Elcomsoft
Popularity
3.2  |  11 Votes
Category Database Files
Format N/A

What is a CAT file?

Contains a catalog of data from various media types including hard drives, network drives, floppy disks, optical discs (DVDs, CDs, etc.), ZIP and JAZ disks, etc.; used for keeping track of information stored within a collection of media

Programs that open CAT files

Updated 2006

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