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Data body mealplan |
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Here is an example of how the data body is fed by routine day-to-day activities, a data body meal plan:
Breakfast: phone calls, drive GPS (global positioning system) equipped car, emerge from surveillance camera equipped subway, go online, send E-mails, complete online registration forms, receive faxes
Lunch: pay lunch with credit card, use your customer card when shopping, use mobile phone, pass through biometric access controls, use smart card
Afternoon snack: visit doctor, file insurance claim
Dinner: respond to TV commercials, complete income tax form, visit chat rooms, use free web mail. Programme phone wake-up call.
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Roman smoke telegraph network, 150 A.D.
The Roman smoke signals network consisted of towers within visible range of each other and had a total length of about 4500 kilometers. It was used for military signaling.
For a similar telegraph network in ancient Greece see  Aeneas Tacitus' optical communication system.
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