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Mobile Security: How to Secure, Privatize, and Recover Your Devices by Mari Heiser, Jaya Nampalli, Joseph Anderson, Darla Nykamp, Tim Speed

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Appendix E. The History of Social Networking, the Internet, and Smartphones

Not so many years ago, when a new college student drove off to college for the first time the parents asked, "Do you have enough change to use a payphone and call home in an emergency on your trip?" Today, this concept of carrying change for a payphone is largely a thing of the past; the vast majority of us carry cell phones. Payphones used to be on the side of every highway and in the parking lot of every gas station. Now, these payphones are becoming rare. It is just assumed that everyone has access to a cell phone. In fact, a lot of people do not even have land lines in their home. After all, why should you pay for two phones when you are always reachable on your cell ...

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