The term SCRUB, TO NASA is an abbreviation for the job title 'ABORT Scrub Technician', which is a position within the National Aeronautics and Space Administration (NASA). The ABORT Scrub Technician is responsible for monitoring and analyzing data from the spacecraft's ABORT system, which is used to safely terminate a mission in the event of an emergency. The technician must also be able to quickly identify any potential problems with the system and take corrective action if necessary.