Crossword Clue:

Thing that keeps track of the beat? Abbr

AnswerCrossword Clue
ECGThing that keeps track of the beat?: Abbr.
RAILWAYOne that keeps track?
MTAOrg. that keeps New Yorkers on track
SATSExams that used to go up to 1600 and then 2400 and now I can't keep track: Abbr.
ETC"And that sort of thing": Abbr.
ETC"And that sort of thing" (Abbr.)