Final answer:
The symbol in data flow diagrams that represents where incoming data is processed into outgoing data is called a process or transformation symbol. It is often depicted as a circle, oval, or rounded-edge rectangle. Data flow diagrams also include entities, data stores, and arrows indicating the direction of data movement.
Step-by-step explanation:
A symbol used in data flow diagrams (DFDs) to depict an entity or process within which incoming data flows are transformed into outgoing data flows is known as a process or transformation symbol. It is typically represented by a circle, oval, or a rounded-edge rectangle in the diagram. This symbol can be used across various fields, but when used in the context of data processing, it indicates a point at which data is processed or manipulated in some manner.
In creating a data flow diagram, the entities that provide input data or receive output data from the system are labeled as external entities and are represented by rectangles or squares. The data stores, which are repositories where the data is held, are symbolized by open-ended rectangles or pairs of parallel lines. Arrows are used to depict the flow of data between processes, entities, and data stores, indicating the direction of data movement.