Short for
line printer daemon/line printer remote, a printer
protocol that uses
TCP/IP to establish connections between printers and
workstations on a
network. The technology was developed originally for BSD
UNIX and has since become the
de facto cross-platform printing protocol.
The LPD software typically is stored in the printer or print server and the LPR software must be installed in the client device. The LPR client sends the print request to the IP address of the LPD printer/server, which in turn queues the file and prints it when the printer becomes available.