This article is from the Europe FAQ, by Yves Bellefeuille firstname.lastname@example.org with help from Martin Rich M.G.Rich@city.ac.uk.
Please see the Paris Transport FAQ by Delphine Kensit,
There's a map of the Paris metro (including RER lines in the central
area) at http://www.citefutee.com/orienter/plan_metro_gif.php, and of
the RER (commuter train) network at