What shape in a flow chart represents a decision?

In flowcharting, the diamond shape is universally recognized as representing a decision point. This shape is used to indicate a branching point in the process where a question is posed, and the flow of control can go in different directions based on the answer to that question. Each branch or path typically represents a "Yes" or "No" response, leading to different subsequent actions or processes in the flowchart.

The other shapes serve different purposes: circles are usually used to denote connectors or off-page references, rectangles represent processes or actions, and ovals generally indicate the start or end points of a flowchart. Understanding the function of each shape allows for clear communication of processes and decisions within the flowcharting framework.