Subject: Re: RER (Réseau Express régional)
Hi Graziella,

You can buy the ticket at the window - you don't have to use the machines.

This web site is fairly comprehensive: http://www.gisparis.com/paris/paris_subway.htm and there's some additional info here: http://www.paris.org/Metro/

Ziners may have practical tips to offer.

Regards, Linda Toronto