Railway Propulsion and Transmission Systems - Links for information on Cummin Engine Co., MTU Friedrichshafen, Remy Barrere Engrenages, and ZF Hurth Bahntechnik GmbH. www.railway-technology.com/contractors/diesel/index.html
Robotic Vehicles Group - Jet propulsion laboratory mars rover group robotics.jpl.nasa.gov/groups/rv/homepage.html
