The present invention can be implemented in a manner to allow operational monitoring and control of networks , vending machines, electronic mail , electronic commerce , electronic business , {HEAD ~ payment} for {TAIL ~ goods} and services, delivery of goods and services, and advertising worldwide 
The present invention can be implemented in a manner to allow operational monitoring and control of networks , vending machines , electronic mail , electronic commerce , electronic business , { HEAD ~ payment } for { TAIL ~ goods } and services , delivery of goods and services , and advertising worldwide
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