Linux Journal: The CUPS Printing System

“CUPS is what its name says: a common UNIX printing system. It
is aimed at providing a common printing interface across a local
network, masking differences among the printing systems on each
computer. I am not sure that such a system is needed in a pure
Linux environment, where the standard Berkely LPD provides this
functionality, but CUPS does provide interactivity with SMB and
Windows printers. CUPS also allows dynamic printer detection and
grouping.

“CUPS is licensed under the GPL by a company called Easy
Software Products…”

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