The Natural Area Coding System (NAC) is a geocoding system developed by NAC Geographic Products.
It provides a unique, simple code that can precisely represent any location on Earth, down to a very fine resolution.
Unlike traditional address systems, NAC can specify locations that do not have conventional postal addresses, making it useful for navigation, logistics, and emergency services.
The NAC system is recognized as an innovative alternative to conventional coordinate systems and postal codes.
Therefore, the correct answer is Natural Area Coding System (NAC).