What Is UPN?
UPN is the complete set of distinct integers from minus infinity to plus infinity.
All the existing number systems, such as ISBNs, Patent Numbers, DNA ID Numbers, and all other ID Numbers, have been designed incorrectly because they are not universally distinct.
UPN is globally or universally distinct and is for giving permanent names to permanent entities.
UPN can be remembered not by the user, but by the completely automated Universal Permanent Software, when the number of UPNs is large.
UPN is a Natural Standard, not an artificial standard.