Final answer:
The incorrect symbol description in system flowcharting is disk. The correct symbols for system components or processes are computer process and manual process. The symbol for display is a correct symbol.
Step-by-step explanation:
The incorrect symbol description in system flowcharting is disk. In system flowcharts, the symbol for disk represents the input or output of data to or from disk storage. This symbol is not used to represent a system component or process. The correct symbols for system components or processes are computer process and manual process. For example, the symbol for a computer process represents a step in the system that is performed by a computer, such as data processing or calculations. On the other hand, the symbol for a manual process represents a step that is performed manually by a person, such as data entry or document review. The symbol for display represents the output of data on a screen or monitor, and it is a correct symbol in system flowcharting.