<http://schema.org/about>
"Well, for now anyway. National Geographic has put every single one of its issues onto one external hard drive. It's 120 years of National Geographic magazine issues (1888 to 2008) in digital format -"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/one-magazine-uses-possibly-the-greenest-method-to-go-digital.html>