Answer: GSM
GSM is a crossword puzzle answer that we have spotted 4 times. There are related answers (shown below). Try defining GSM with Google.
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Recent usage in crossword puzzles:
- New York Times - Feb. 25, 1982
- New York Times - Aug. 7, 1980
- New York Times - May 11, 1980
- New York Times - May 28, 1978