CUPS (Common Unix Printing System) is a modular printing system. It's based upon the Internet Printing Protocol and supports PostScript or PDF and various raster printers. The spooler and drivers can deliver jobs remotely via IPP, LPD, SMB, and locally to USB, SCSI, Firewire, WiFi, serial, or parallel devices. Extensive filter support allows a wide range of input formats and printer targets to be supported. It's usable with BSD, Linux, MacOSX and Windows servers.
major feature: The focus of this major release is on performance and security improvements. The scheduler did not preserve listener sockets from launchd or systemd after a restart. Added some USB quirk rules for the libusb-based USB backend. Spanish localization update. Updated documentation for 2.0.0 release.