The Handbook
is a frontend to the print spooler. Its primary purpose is displaying the print queue and removing jobs from the queue.

Introduction
is a frontend to the print spooler. Its primary purpose is displaying the print queue and removing jobs from the queue. But you can even disable/enable printing or move jobs to the top of the queue, if you have the necessary access permissions.
does not modify the printqueue by itself, but uses the underlying commands: lpq, lprm and lpc. For this reason should be safe as long as lpq, lprm and lpc are safe.
supports BSD, PPR and LPRng spooling systems
network transparency
supports drag & drop