Answers
An arrow, usually labelled, showing the route data takes between parts of a system.
The words written beside a link to name the data being passed.
An action performed on data, transforming it from input to output.
A place where data is kept, labelled D if electronic and M if written on paper.
A drawing used to explain how a system works, showing where data comes from and where it goes.
A person, department or organisation that interacts with the system, supplying or receiving data.