The WHO command runs a program which will display information about the
status of all jobs currently on the system.  If you are at a display
terminal, the information will be updated as long as you keep running the
program; at a Teletype or over a network connection the information is typed
once only.  The main information provided is in the first part of the
display, a list of all jobs on the system.  The most important parts of this
list are the job number (JOB), the running status of the job (QUEUE, i.e.,
RUNQ if runnable, IOWQ if waiting for input or output, STOP if stopped), the
project-programmer name (PPN), the terminal number (LINE) or DET for
detached jobs, and the name of the program the job is running (JOBNAM).

From a non-display terminal, the command "WHO/Q" will give a Quick list of
PPN and TTY only instead of the rather verbose complete WHO display.

For complete information, see the printed Monitor Command Manual, which is
online as MONCOM.BH[S,DOC], with updates in MONCOM.UPD[S,DOC].