Answer: nbs

AnswerCrossword Clue
NBSWeights-and-measures agcy.
NBSNotes for special attention: Abbr.
NBSFootnote abbreviations.
NBSLatin admonitions to the reader: Abbr.
NBSU. S. research org.
NBSMeasurements overseer: Abbr.
NBSFed. office of measures formerly
NBSOld measurement agcy.