In this regard, the utility of the Multipurpose Internet Mail Extension type and file name extension is somewhat reduced.
From the en.wikipedia.org
One inconvenient aspect is that you cannot open a file in a folder listing by clicking on it, because of the lack of a file name extension.
From the en.wikipedia.org
By convention, the job label is the same as the plist file name, without the .plist extension.
From the en.wikipedia.org
I would also note that the file name never required an extension.
From the en.wikipedia.org
In file systems, the full stop is commonly used to separate the extension of a file name from the name of the file.
From the en.wikipedia.org
Traditionally the name of the file ends with extension .db.
From the en.wikipedia.org
Note that the file extension abbreviations are different from the codecs which have the same name.
From the en.wikipedia.org
As is the case with many file formats, APK files can have any name needed, but must end with the four character, three letter extension, .apk.
From the en.wikipedia.org
If you need to change the format of a file, save a copy off of Wikipedia and then reload it under a new name with the new extension, rather than renaming it.