(computing) The name assigned to a file in a file system.

plural of filename

plural of filename extension

(computing) A file extension.

plural of short filename

plural of long filename

(computing, chiefly Microsoft Windows) A filename where the filename itself, the file extension, or both, are longer than that possible with an 8.3 filename.

(computing, chiefly MS/PC-DOS and Microsoft Windows) An 8.3 filename.