In Macintosh computers the Desktop is where you launch and store
programs, copy files, make alterations in the way your computer works,
etc. The icons that appear on the desktop may be for drives,
applications, folders, or documents. Applications, or programs are
used to create documents and folders are to help organize programs and
documents. (Does this sound familiar?) Just as in other operating
systems, in System 7+ there are several ways to do things. For
example, on the Desktop, there are several ways to start a
program. You can click once on the icon and then choose open from the
File menu. The program can also be started by clicking twice on the
icon or by using a keyboard shortcut; the command key plus the letter
O. These choices let you decide what works best and is the most
comfortable for you.