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58 Cards in this Set
- Front
- Back
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data processing system
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An automated system for processing the data for the records of an organization
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application program
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A computer program that performs a specific task of practical value in a business situation.
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random access processing
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A file access method that provides direct access to a specific record
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key
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Data fields that uniquely identify a record in a file.
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information system
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An automated system which organizes data to produce information
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management information system
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A system that provides information to management.
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data
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Isolated facts.
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information
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Organized or summaried data.
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database
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A collection of interrelated data items that can be processed by one or more application systems.
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database system
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A database, a database management system, and appropriate hardware and personnel.
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database management system (DBMS)
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Systems software that facilitates the management of a database.
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homonym
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A term that has different meanings in different contexts.
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synonyms
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Terms that mean the same things.
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data model
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A conceptual method of structuring data.
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hierarchical model
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A data model that assumes all data relationships can be structured as hierarchies.
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pointer
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A physical address which identifies where a record can be found on disk.
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child
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An "owned" record in a heirarchical relationship.
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parent
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An "owner" record in a hierarchical relationship.
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network
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A data relationship in which a record can be owned by records from more than one file.
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client/server platform
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A local area network consisting of client computers which receive services from a server computer.
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database server
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A program runing on server hardware to provide database services to client machines.
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Graphical User Interface (GUI)
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Screens and functions that provide a graphical means for an end user to access a computer system.
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open systems
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The concept of connecting a variety of computer hardware and software to work in concert to achieve user goals.
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interoperability
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The state of multiple heterogeneous sytems communicating and contributing to completion of a common task.
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metadata
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Data in the data dictionary which describe the database.
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data view
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A definition of a restricted portion of the database; also called a view.
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users
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People who need information from the database to carry out ther primary business responsibility.
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practitioners
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people responsible for the database system and its associated application software.
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procedure
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Written instructions describing the steps needed to accomplish a given task in a system.
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data integration
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Combining data for common use.
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electronic data processing
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Computer automation of paperwork at the operational level of an organization.
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management information sytem
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Automated system focused on information for middle management.
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decision support system
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Automated system providing strategic information to senior management.
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centralized database
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Database physically confined to a single location.
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distributed database system
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A database system made of several systems at local sites, connected by communication lines.
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database planning
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Strategic effort to determine information needs for an extended period.
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database development life cycle (DDLC)
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A process for designing, implementing, and maintaining a database.
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database administration
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Personnel with responsibility for controlling and protecting the database.
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conceptual database design
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identification of data elements, relationships, and constraints for a database.
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value constraint
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A rule defining the permissible values for a specific data item.
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physical database design
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Determination of storage devices, access methods, and indexes for using a database.
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information center
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An area where users have facilities to do their own computing.
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retrieve only access
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Database access with no update allowed.
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data integrity
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Accuracy and consistency of data values in the database.
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three-level architecture
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Standard database structure consisting of conceptual, external, and internal levels.
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conceptual level
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Data-base structural level defining user views.
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internal level
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Database structural level defining physical view of database.
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system development life cycle (SDLC)
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A process for system development.
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function-oriented approach
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Views a system from the perspective of the functions it should perform.
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data-oriented approach
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Focuses on the analysis of data used by the functions.
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preliminary planning
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Planing for a database that occurs during the strategic database planning process.
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feasibility study
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Portion of the DDLC that determines technological, operational, and economic feasibility of database.
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technological feasibility
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Determination of hardware and software availability for database system.
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operational feasibility
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Determination of availability of expertise and personnel needed for the database system.
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economic feasibility
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Cost-benefit study of proposed database system.
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requirements definition
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Determination of management and functional area information requirements.
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conceptual design
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Creation of conceptual level scheme for database.
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database implementation
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The steps required to change a conceptual design to a functioning database.
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