High Quality Content by WIKIPEDIA articles! In computing, print is a command in the command line interpreters (shells) of DOS, OS/2 and Microsoft Windows. It is used to add a text file to the print queue. Because of the text file limitation it is not equivalent to the lpr command in the Berkeley printing system or the lp command in the System V printing system (both available in the CUPS printing system). The command was introduced in MS-DOS version 2. Another option to print files is to use the copy command to copy files to one of the LPT printer ports.