1) NY subway 2) NY subway line 3) Big Apple subway 4) Big Apple subway div 5) Big Apple subway line 6) First subway line in NYC 7) New york subway initials 8) New York subway inits 9) NY subway system 10) Old New York City subway line 11) One way to Carnegie Hall 12) Onetime BMT rival 13) Subway in NYC 
NYC subway division called Interborough Rapid Transit. Includes 1, 2, 3, 4, 5, 6, 7, 9 subway lines.
Identification, Referral and Tracking Project now ISA
Institute fur Rundfunktecktecknik GmHB (Germany)
A train line in NY that had many burners because its cars were all flats.
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Identification, Referral & Tracking system
A train line in NY that had many burners because its cars were all flats.