This port is for a printer filter of Canon BJ F850ug. The filter is called Canon Bubble Jet Print Filter for Linux and there exist the filters for other Canon bubble jet printers. By using this driver you can print out as high quality as you use the Windows driver. See the below URLs: WWW: http://www.canon-sales.co.jp/drv-upd/linux/bjlinux100.html file:/usr/local/share/doc/bjfiltercom-1.3/html/README.HTM file:/usr/local/share/doc/bjfiltercom-1.3/html/INDEX.HTM file:/usr/local/share/doc/bjfiltercom-1.3/html/FAQ.HTM And then this port has filters filter850ug and filter850ug_gui which are useful to print out more than one page. Then you execute the next command: /usr/local/libexec/bjfilter850ug/setup to setup /etc/printcap and make spools in /var/spool/lpd/. Notice: If you use filter850ug_gui in the printer server, for example hostA then you have to run X, execute "xhost hostA" and execute "lpr" on the host which you are using. Notice: This is supported BCI-6 inks. Notice: bjfilter850 and bjfilter850ug cannot be installed simultaneously.