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