| Rank | Abbreviation | Meaning |
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| ***** | RATE AND SERVICE STRUCTURE. | The prices a carrier charges and the services and amenities it provides, considered as a whole system.
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| **** | SERVICE COMPRIS. | Fr. Literally, 'service included,' that is, there is no need for an additional tip.
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| ** | FULL SERVICE HOTEL. | A hotel with a restaurant.
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| * | LIMITED SERVICE HOTEL. | A hotel without a restaurant.
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| * | COMMERCIAL SERVICE AIRPORT. | As defined by the FAA, a publicly owned airport with scheduled passenger service and at least 2,500 passenger boardings a year.
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| * | SERVICE NON COMPRIS. | Fr. Literally, 'service not included,' that is, an additional tip is expected.
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| * | ELECTRONIC RESERVATIONS SERVICE PROVIDER (ERSP). | Also, ERSP#. An ARC designator that identifies airline bookings made online.
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| * | FULL SERVICE AGENCY LOCATION. | A branch of an agency that provides customers both reservations and ticketing.
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| * | PASSENGER SERVICE INDICATOR. | A one- or two-digit code, administered by IATA, which identifies specific passenger terminals at airports having more than one such terminal.
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| * | PASSENGER SERVICE AGENT. | An airline employee assigned to assist passengers checking in and boarding.
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| * | PASSENGER SERVICE REPRESENTATIVE. | An airline employee assigned to providing information and other services, such as wheelchair assistance.
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| * | LIMITED SERVICE AGENCY LOCATION. | A branch of a travel agency that takes reservations but doesn't provide ticketing.
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| * | OTHER SERVICE INFORMATION. | Notes attached to a PNR that do not require attention by the airline.
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