There are three main classes of objects defined by CUA 91 and implemented in the Workplace Shell:
Each object is represented on the desktop by an icon.
Objects typically have a default action which is performed on other objects which are dropped on the object. For example, a printer is a device from the user's perspective. However, it also is a container since it can queue several files. A shredder is a device which deletes the objects dropped on it. A diskette is a container which stores the objects dropped on it.
The objects found in the Workplace Shell are discussed in this section.