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D-4 Glossary and Index
common on older Digital Equipment corporation printers. Rarely
used today. Can be handled with TROY XCD external print
servers via a third-party adapter.
DECNET A network operating system and the corresponding
protocol developed by Digital Equipment Corporation. Not to be
confused with LAT, which is a different DEC protocol.
DECprint Supervisor Sophisticated PostScript-based printing
software for VMS that handles job queueing, error and status
reporting, and translation of PCL, Tektronix 4014, and LN03 page
description languages. pp. 1-2, 11-10.
Digital UNIX The latest Digital Equipment Corporation version
of UNIX. It replaces OSF/1 and ULTRIX, and uses standard
Berkeley UNIX TCP/IP and lpr/lpd for printing. p. 4-4.
Direct Mode IPX The protocol used by Windows 95 for peer-to-
peer communications. Chapter 8.
DLC/LLC A protocol used for printing on Windows for
Workgroups, LAN Manager, and other network operating systems;
being phased out in favor of newer protocols like Windows 95
Peer-to-Peer direct mode IPX and TCP/IP. Chapter 10.
DMA Direct Memory Access. A high performance computer
architecture in which data is transferred in large blocks between
the processor's memory and an external device without any
processor intervention. p. 1-3, 2-11, 2-19, 2-20, A-5
DOS Disk Operating System; now commonly refers to the PC
operating system developed by Microsoft that is officially called
MS-DOS.
Download The process of copying firmware or software from a
computer to another computer or other device on the network
(such as a print server). Appendix C.
Driver Low-level software that interfaces a hardware device such
as a printer to the computer's operating system. The driver allows
programs running on the computer to access the hardware device
in a relatively simple manner.