From ZOZ to WIZ
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Let's make some practical sense out of this A -> B paradigm.

Suppose that object # 748392033005 is a temperature sensor, and object # 66748933 is some sort of printer. Then this single instruction:

   748392033005 -> 66748933

prints the temperature. We can assign the symbols "tempSense" and "printer" to the numbers 748392033005 and 66748933, and then describe this instruction like this:

   tempSense -> printer

Serial numbers are unique across the planet. There is only one temperature sensor # 748392033005. There might be millions of other temperature sensors, but these would all would have a different serial number.

Additionally note that these basic hardware objects can be located anywhere. Temperature sensor # 748392033005 might be in Boston and printer # 66748933 might be in Belgrade. It doesn't matter, wherever they are, the ZOZ will find them and transmit the data from the first to the second.