Quiescent during VAB operations with no non-option arguments, it reads from.

SUBSYSTEM MANIPULATOR POWER DRIVE UNIT THRUST VECTOR SRB е CONTROLS * INDICATORS e DISPLAYS BACKUP OPTICAL UNIT NOSE AIR DATA COMPUTER FORWARD AVIONICS BAYS TACANS RADAR ALTIMETERS MSBLS RECEIVERS AIR DATA COMPUTER FORWARD AVIONICS BAYS (4, 5, AND 6) FUEL FUEL SERVICING RECEPTACLES (APU SYSTEMS APU.