Computer System Concept

•    A system of hardware devices organized by function
                        Input

•Keyboards, touch screens, pens, electronic mice, optical scanners

•Converts data into electronic form for entry into computer system         
Processing

•Central Processing Unit (CPU)

•CPU subunits: arithmetic-logic and control unit
Output
•Video display units, printers, audio response units, and so on
•Converts electronic information into human-intelligible form
Storage
•Primary storage (memory)
•Secondary storage (disk drives)
Control
•CPU controls other components of the system