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An introduction to computers and computer systems
An introduction to computers and computer systems

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This is a functional block diagram with the following labels: Processor; Main memory; Hard disk; Secondary memory subsystem (hard drive); SD card reader; Secondary memory subsystem; Keyboard; Keyboard input subsystem; Mouse; Mouse input subsystem; Monitor; Monitor output subsystem; Speakers; Speakers output subsystem (sound card).
Figure 1 Functional block diagram for a laptop.

 1 The personal computer