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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:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
W44 - Extension Details
Date Added: January 01, 1970
File Extension:  .W44
Description 1: File extension .W44 is attached to dBASE temporary files. Temp files are created by computer systems when programs fail in allocating enough memory for tasks. They are also generated whenever applications work on data that is larger than the available address space of the architecture. W44 files can also function as a primitive mode of interprocess communication.
File Type:   Temporary file
Mode: Binary
Program(s) to Open:  Associated application: dBASE from dataBased Intelligence, Inc.
Common:
Extension: