"The narratives, flowcharts, diagrams, and other written materials that explain how a system works."
Data Flow Diagram (DFD)
"A graphical description of the source and destination of data that shows data flow within an organization, the processes performed on the data, and how data are stored."
A graphical description of the flow of documents and information between departments or areas of responsibility within an organization.
"A graphical description of the relationship among the input, processing, and output in an information system."
A graphical description of the sequence of logical operations that a computer performs as it executes a program.
"Represents the flow of data between processes, data stores, and data sources and destinations."
"An Analytical technique used to describe some aspect of an information system in a clear, concise, and logical manner."
Devices or media that provide input to or record output from processing operations.
Either shows what type of device is used to process data or indicate when processing is performed manually.