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12 CHAPTER 1 / INTRODUCTION
Movement Movement
Control Control
Storage Processing Storage Processing
(a) (b)
Movement Movement
Control Control
Storage Processing Storage Processing
(c) (d)
Figure 1.2 Possible Computer Operations
worked on at any given moment.Thus, there is at least a short-term data storage func-
tion. Equally important, the computer performs a long-term data storage function.
Files of data are stored on the computer for subsequent retrieval and update.
The computer must be able to move data between itself and the outside world.
The computer’s operating environment consists of devices that serve as either
