Reference number: CH000043
How to create file
extensions longer than three characters.
Question:How to create file extensions longer
than three characters.
Answer:Microsoft DOS, Windows 3.x, Windows 95,
Windows 98, and Windows NT
These versions of Microsoft Windows do not support file extensions
longer than three characters.
Microsoft Windows 2000, Windows ME,
Windows XP These versions of Microsoft Windows do support file extensions that are
longer than three characters. However, it is important to realize
that the majority of all Microsoft programs that rely on file extensions
commonly only utilize three character file extensions.
BSD, all Apple Macintosh Operation
systems, Linux, OS/2 Warp, Unix, and variants of each of the these
operating systems Each of these operating systems support the availability of a
longer than three character file extension, although some of these
operating systems do not utilize file extensions. While it is
possible to create a file extension longer than three characters in
these operating systems, the programs used to open the files must also
support long file extensions.
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