0NF See Zero Normal Form (0NF).
1NF See First Normal Form (1NF).
2NF See Second Normal Form (2NF).
3NF See Third Normal Form (3NF).
Abstraction A representation of a subject that excludes unnecessary detail while focusing on important features.
ACID An acronym for atomicity, consistency, isolation, and durability .
Action Diagram Generic term for a graphical representation of the movement of data in a system.
Actuator A mechanical arm consisting of a read head and/or a write head that can extend over or under a disk platter.
Aggregate Data Item See Group Data Item.
Alternate Key In the relational ...
