This command sets the priority of the current job to the given priority. Priority must range from 0 to 127.
Multitasking jobs waiting for a keypress or anything else to be activated slow down the whole system although they are actually doing nothing. A job which is waiting (perhaps for a certain amount of time) for input could set its own priority to one, and then when it is able to continue, reset to a higher priority value.
If a job has priority 0 it will not be able to run. Other tasks may however set that job’s priority (eg. with SPJOB and allow it to continue).
is exactly the same as PRIO, priority, or PRIORITISE.