Decrease in velocity per unit time; in transit practice, often measured in feet per second squared (meters per second squared) or, in the United States, miles per hour per second. (TRB)
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DECENTRALIZATION
The process of distributing computer processing to different locations within an organization.
DECISION SUPPORT SYSTEM
An interactive system that provides the user with easy access to decision models and data in order to support semi-structured decision-making tasks.
DECK
The floor of a rail car, bus, or boat. (TRB)