$SERVER()

Controls server IMODs.

$TIMER()

Sets one or more asynchronous timers.

$WHEREFROM()

Determines where an IMOD was called from.

BATCHRC()

Sets STEP return code during batch execution.

CPUTIME()

Returns elapsed CPU time for IMOD task.

ENQUEUE()

Reserves resources for the use of an IMOD task.

LOADIMOD()

In batch mode, causes the specified IMODs to be loaded into storage and made available for processing.

LOCIMOD()

Determines the availability and location of an IMOD.

PAUSE()

Delays execution of an IMOD for a specified number of seconds.

SCRASID()

Sets the default ILOG or IMOD by origination ASID.

SETRC()

Specifies returned value of RC in external subroutine.

SPAWN()

Begins the simultaneous execution of another IMOD.

VARSIZE()

Sets the maximum length of REXX variable string.