| Περίληψη: | The chapter is introductory and aims to create the necessary learning background basic concepts and definitions.<br/><br/>Specifically, the chapter negotiates the following topics:<br/>• Definition of the term "Information Society"<br/>• Brief presentation of historical information of evolution.<br/>• Report on the types and uses of modern computers (desktop, notebook, esnomatomenoi, etc.).<br/>• Detailed reference to the architecture of the H / Y, which includes the basic concepts of architectural design.<br/>• Presentation of "hardware" and "software"<br/>• Detailed reference to the operating system, which includes a brief presentation of the historical development of OS, basic concepts, structure and categories of OS.
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