On TAG, screens are organized through an "index" called the Main Menu screen. The Main Menu screen is the first thing you see after you successfully start up TAG.
Each named item along the top of the Main Menu is a menu (a listing of related screens). The menus and screens you see will depend on your security clearance. Every Main Menu screen has Search/Assign, Utilities and Exit menus. Most have the Institutions or Community menus. If your site has Trust Accounting, Payroll or Commissary, you may have these menus on your Main Menu screen, too.
Because TAG has too many screens to display on one menu, many screens are located on sub-menus which become available once you've entered a menu. An arrow beside a menu entry indicates a sub-menu. All other entries are screens.