Clicking on an item will let you access files or run programs. Look back at the menu bar again. Each of these menus accesses its own drop-down menu with its own set of items. Apple icon menu contains system info and special programs that deal with running the computer. File menu contains file items like open, print, save, quit, move to trash and close.
Edit menu contains editing items like undo, cut, copy, paste and clear.
View menu contains items for changing how things appear on the screen. Help menu contains items to access tutorials or helpful information. On a Mac system, the menu bar always remains at the top of the screen, except when running certain programs, like games, that do not require a menu bar. Many programs and applications run within windows or boxes that can be opened, minimized, resized and closed. When a program window opens, you may notice that the menus on the menu bar change.