The ALLSPOOL privilege lets the user's process allocate a spooled device by executing the Allocate Device ($ALLOC) system service or by using the DCL command ALLOCATE.

The $ALLOC system service lets a process allocate or reserve a device for its exclusive use. A shareable mounted device cannot be allocated.

Grant this privilege only to users who need to perform logical or physical I/O operations to a spooled device. Ordinarily, the privilege of allocating a spooled device is granted only to symbionts.