XVROS stands for the "eXtensible Virtual Reality Operating System". The project's goal is to develop a collection of open protocols for building distributed onlinevirtual reality environments.
... Amazon, the largest river in the world by volume, the Parana[?] with its impressive Iguaçu[?] falls, the Rio Negro, São Francisco[?], Xingu, Madeira and the Tapajós[?] ...