A @@@ file extension is related to the Microsoft CodeView screen format.

Detailed description

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@@@ file extension - Microsoft CodeView screen

What is @@@ file? How to open @@@ files?

File type specification:

Various data file type icon Various data file type

The @@@ file extension is related to the Microsoft CodeView and used for its screen files.

Screen files used in the installation and instruction by e.g. Microsoft CodeView for C. CodeView was a standalone debugger created by David Norris at Microsoft in 1985 as part of its development toolset.

It originally shipped with Microsoft C 4.0 and later. It also shipped with Visual Basic for MS-DOS, Microsoft Basic PDS, and a number of other Microsoft language products. It was one of the first debuggers on the MS-DOS platform that was full-screen oriented, rather than line oriented (like its predecessors DEBUG.COM and symdeb).

This @@@ file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .@@@ file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

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