A chart form is a type of graphical representation of data that is used to display information in an organized and easy-to-understand manner. The term 'chart form' is often used interchangeably with the term 'PIE chart, ' which is a type of chart form that uses a circular graph to represent data. PIE charts are particularly useful for displaying proportions or percentages, as each section of the PIE represents a different proportion or percentage of the whole.