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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
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CAT - Extension Details
Date Added: May 03, 2009
File Extension:  .CAT
Description 1: .CAT file extension is linked with dBASE/CP Backup Catalogue File. This is the file extension for the backup catalogue file utilized by dBASE dBASE was the first widelyused DBMS [database management system] for microcomputers. It was published by AshtonTate for CP/M and later on AppleII, Apple Macintosh, VMS, Unix and IBM PC under DOS.
Description 2: .CAT file extension is linked with IBM Cognos Impromptu Database Report. This is the file extension for the impromptu database utilized by IBM Cognos or IBM Cognos Business Intelligence is a comprehensive application on a single architecture. It has key features that are beneficial for both business and IT users. IBM Cognos are owned and developed by IBM Corporation.
Description 3: .CAT file extension is linked with Advanced Disk Catalog Database. This file contains a data catalog from numerous forms of media such as network and hard drives, optical disks, floppy disks, JAZ and ZIP disks, and others. CAT file is used in tracking mediastored information. Advanced Disk Catalog is a userfriendly, 32bit cataloging application for Windows. This application offers easy userinterface, organizing of files/folders/volumes into categories, duplicate file search, file export and merging, among others. .CAT and Advanced Disk Catalog are owned and developed by ELCOMSOFT.
Description 4: .CAT file extension is linked with Quicken IntelliCharge Categorization File. This is the file extension utilized by Quicken an application that helps users track, manage and plan their assets and finances. Other key features of Quicken are: basic budgeting, bills payment, complex investing and assets cataloguing. Quicken is owned and developed by Intuit Inc.
Description 5: .CAT file extension is linked with Advanced Disk Catalog Disk Catalog. This is the file extension for the disk catalog utilized by ADC [Advanced Disk Catalog] an easytouse 32bit cataloging application designed for Windows. ADC by nature does not utilize a database engine, which makes it versatile, compact and fast. It has an Explorerlike interface that allows convenient cataloging of data on different media types such as hard disks, floppy diskettes, ZIP and JAZ disks, optical disc and others. ADC is owned and developed by ELCOMSOFT.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: Advanced Disk Catalog
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