Rio is a big city in Brazil.
Johnny arranged a meeting with Ralfi Face under the pseudonym "Edward Bax", clandestine importer, late of Rio and Peking.
Rio housed an A.I. mainframe owned by Frog company.
In Cyberspace[]
The Rio section contains the Government of Brazil, which is "lit up like a Christmas tree". That sector has heavy commerce, with big businesses and multinationals. There was also a white cube of dense ICE that was the A.I. which Dixie Flatline attempted to tap and fried his brain (earning his name).