What does STET stand for?

Societa Finanziaria Telefonica per Azioni (EFIS)

Specialized Technique for Efficient Typesetting

Specialized Technique for Efficient Types (or Typesetting) (SAUS)

Steward, Technical - Marine Corps

Stewart - NCIC trailer make code

Submaximal Treadmill Exercise Test (AAMN)

System Test Experiments Tape

stetted (SAUS)

stetting (SAUS)