enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Entity–relationship model - Wikipedia

    en.wikipedia.org/wiki/Entity–relationship_model

    An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).

  3. Airline reservations system - Wikipedia

    en.wikipedia.org/wiki/Airline_reservations_system

    Since airline reservation systems are business critical applications, and they are functionally quite complex, the operation of an in-house airline reservation system is relatively expensive. Prior to deregulation [clarification needed], airlines owned their own reservation systems with travel agents subscribing to them. Today, the GDS are run ...

  4. Computer reservation system - Wikipedia

    en.wikipedia.org/wiki/Computer_reservation_system

    The MARS-1 train ticket reservation system was designed and planned in the 1950s by the Japanese National Railways' R&D Institute, now the Railway Technical Research Institute, with the system eventually being produced by Hitachi in 1958. [6] It was the world's first seat reservation system for trains. [7]

  5. Database design - Wikipedia

    en.wikipedia.org/wiki/Database_design

    A sample entity–relationship diagram. One of the most common types of conceptual schemas is the ER (entity–relationship model) diagrams. Attributes in ER diagrams are usually modeled as an oval with the name of the attribute, linked to the entity or relationship that contains the attribute.

  6. Enhanced entity–relationship model - Wikipedia

    en.wikipedia.org/wiki/Enhanced_entity...

    The enhanced entity–relationship (EER) model (or extended entity–relationship model) in computer science is a high-level or conceptual data model incorporating extensions to the original entity–relationship (ER) model, used in the design of databases.

  7. Data modeling - Wikipedia

    en.wikipedia.org/wiki/Data_modeling

    An entity–relationship model (ERM) is an abstract conceptual representation of structured data. Entity–relationship modeling is a relational schema database modeling method, used in software engineering to produce a type of conceptual data model (or semantic data model ) of a system, often a relational database , and its requirements in a ...

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Passenger service system - Wikipedia

    en.wikipedia.org/wiki/Passenger_Service_System

    The departure control system (DCS) is the system used by airlines and airports to check-in a passenger. The DCS is connected to the reservation system enabling it to check who has a valid reservation on a flight. The DCS is used to enter information required by customs or border security agencies and to issue the boarding document.