Printer Driver Printer drivers in different operating systems Unix and Unix-like Unix and other Unix-like systems such as Linux and OS X use CUPS (short for Common Unix Printing System), a modular printing system for Unix-like computer operating systems, which allows a computer to act as a print server. A computer running CUPS is a host that can accept print jobs from client computers, process them, and send them to the appropriate printer. Printer drivers are typically implemented as filters. They are usually named the front end of the printing system, while the printer spoolers constitute the back end. Backends are also used to determine the available devices. On startup, each backend is asked for a list of devices it supports, and any information that is available. DOS DOS supports predefined character devices PRN:, LPT1:, LPT2: and LPT3: associated with parallel printers supported in the system. Similarly, serial printers can be used with AUX...