noun Technical meaning of 8.3 (file system, filename extension) A common shorthand for the limits on filename length imposed by the file system used by MS-DOS and Microsoft Windows - at most eight characters, followed by a ".", followed by a filename extension of at most three characters. 1
noun 8.3 (computing, retronym) The naming convention in older MS-DOS and Microsoft Windows computers, restricting file names to eight characters followed by a decimal point and a three-character file extension. 0
