Billions of people live without an address—something that can hinder everything from emergency assistance to pizza delivery. From his time in the music industry overseeing the delivery of music equipment for performers, Chris Sheldrick was able to develop a system that offers every single location on earth a precise, three-word address. It’s done by dividing “the entire planet into [roughly 57 trillion] three-meter squares” and assigning each square a unique three-word identifier (using 47,000 words in 14 languages). The system is already being used by NGOs and post services. Learn more at Sheldrick’s TED talk.