The Workplace Shell uses the term "queue driver" to identify the queue processor. Each queue has its own queue processor, which prints a spool file. The Presentation Manager interface delivers two different queue drivers. Presentation Manager system queue drivers are supplied in the files PMPRINT.QPR and PMPLOT.QPR.

The spooler calls these functions by using DosLoadModule and DosGetProcAddr. Queue drivers can be 16-bit or 32-bit DLLs.

The user can supply queue drivers to support user data types, however, any queue driver created by the user must support PM_Q_STD and PM_Q_RAW standard data types.