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31 BART Bay Area Rapid Transit CTA Chicago Transit Authority EAM Equipment Asset Management El/Es Elevators/escalators MARTA Metropolitan Atlanta Rapid Transit Authority MMS Maintenance management system MRL Machine-room-less elevator NYCTA New York City Transit Authority OEM Original equipment manufacturer OJT On-the-job training O&K Orenstein & Koppel (escalators) OOS Out of service PA Public address system PM Preventive maintenance PMI Preventive maintenance inspection QA Quality assurance QEI Qualified Elevator Inspector RSS Really Simple Syndication SEPTA Southeastern Pennsylvania Transportation Authority SMS Short Message Service TRIS Transportation Research Information Services WMATA Washington Metropolitan Area Transit Authority WO Work order AbbreviAtions And Acronyms
