These are the Internet and Cellular. Both rely on the Computer.
The Internet you already know about, but for this posting, I want to explain the Cellular Network, which uses a Radio technology.
It has been very profitable, and cellular towers are everywhere. Each of these serves a small area around the tower, called a cell. Got that?
Previous Radio technology used powerful transmitters that covered wide areas, each using a particular frequency. Since radio frequencies are limited, this limited the number of users. Cellular technology, by contrast, can service a huge number of users.
Each phone message is prefixed with a user number, and phones will only receive messages addressed to them. Many messages can be operational at the same time. Multitasking is a common digital technology.
The cellular networks use low-powered transmitters that can only be received inside their cell. As the user moves to another cell, network computers move him to another cell. Clever, huh!
He (or she) can keep talking, not realizing they are in a different cell, talking to a different tower.
This causes a very big problem: our computers are smarter than we are. We have outsmarted ourselves!
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