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Essential Guide to Computing: The Story of Information Technology, The by E. Garrison Walters

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Chapter 10. Digital vs. Analog: Communications Basics

Years of taking "walking around polls" reveals a startling fact—excluding engineers and scientists, the percentage of the population that actually understand the difference between digital and analog communications hovers around zero. Since it is extremely difficult to comprehend developments in computers and communications without being conversant with digital systems, this chapter will focus on three fundamental aspects of the digital communications revolution. The first section covers the ways in which information can be carried in communications. It explains the difference between analog and digital and gives meaning to the popular term bandwidth. The second and third sections describe ...

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