1) LA bus co 2) LA commuter org 3) NY commuter org 4) NY transit co 5) NY transit operator 6) NY transit org 7) AirTrain JFK servicer 8) Big Apple mass transit inits 9) Big Apple subway org 10) Boston commuter syst 11) Boston subway initials 12) Boston subway inits 13) Boston system 14) Boston transit inits 
1. Metropolitan Transit Authority Includes BMT, IND and IRT subway divisions as well as surface transit divisions. 2. Mad Transit Artists Bronx crew from the late 1970s led by CHINO MALO and REE aka OPEL.
Message transfer agent is used to pass mail from the sending machine to the receiving machine. There is a MTA program running on both the sending and receiving machine. Sendmail is a MTA.
Mail Transfer Agent / Message Transfer Agent, details ...
abbreviation: Minimum Terrain Clearance Altitude
Medical Technology Assessment
Mail Transport Agent + Message Transfer Agent + Multimedia Terminal Adapter + Multiple Terminal Access + Multithreaded Architecture
Message Transfer Agent. The store-and-forward element of an email system. The end user element is a UA (User Agent). MTA and UA are terms in X.400 but are applicable to email generally, including the Internet email protocol, SMTP.
Metropolitan Transit Authority. (NYC)
Mail Transfer Agent
Message Transfer Agent. In x.400, a process that is responsible for storing and forwarding messages.
Metropolitan Transit Authority. (NYC)