The term 'Toolbar Heading' refers to the three main categories of options found at the top of a computer program's toolbar. These categories are EDIT, FILE, and HELP, each of which is represented by four letters. The EDIT category contains options for editing text, images, and other content within the program. The FILE category contains options for saving, opening, and printing documents. Finally, the HELP category contains options for accessing tutorials, support, and other assistance related to the program.