3.7 Describe briefly four different interaction styles used to accommodate the dialog between user

and computer.

3.8 The typical computer screen has a WIMP setup (what does WIMP stand for?). Most common

WIMP arrangements work on the basis of a desktop metaphor, in which common actions are

likened to similar actions in the real world. For example, moving a file is achieved by selecting it

and dragging it into a relevant folder or filing cabinet. The advantage of using a metaphor is that

the user can identify with the environment presented on the screen. Having a metaphor allows

users to predict the outcome of their actions more easily.

Note that the metaphor can break down, however. What is the real-world equivalent of formatting

a disk? Is there a direct analogy for the concept of undo? Think of some more examples

yourself.