1. LPRng is an enhanced, extended, and portable implementation of the Berkeley LPR print spooler functionality. LPRng provides the same interface and meets RFC1179 requirements, but the implementation is completely new and provides support for the following features:lightweight (no databases needed) lpr, lpc, and lprm programs; dynamic redirection of print queues; automatic job holding; highly verbose diagnostics; multiple printers serving a single queue; client programs do not need to run SUID root; greatly enhanced security checks; and a greatly improved permission and authorization mechanism. LPRng is compatible with other print spoolers and network printers that use the LPR interface and meet RFC1179 requirements. LPRng provides emulation packages for the SVR4 lp and lpstat programs, eliminating the need for another print spooler package. These emulation packages can be modified according to local requirements, in order to support older printing systems. For users who require secure and/or authenticated printing support,LPRng supports Kerberos V, MIT Kerberos IV Print Support, and PGPauthentication. Additional authentication support is very simple to add. From Redhat 8.0 RPM

2. lpr/lpd printer spooling system The LPRng software is an enhanced, extended, and portable version of the Berkeley LPR software (the standards UNIX printer spooler) You can use this for local and remote printers. From Debian 3.0r0 APT