computer filename

computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures

name - a language unit by which a person or thing is known; "his name really is George Washington"; "those are two names for the same thing"

file name extension, filename extension, extension - a string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename; "most applications provide extensions for the files they create"; "most BASIC files use the filename extension .BAS"