Public Transport in Vienna and Austria:
Official site of the Vienna Transport Authority.
VOR - Verkehrsverbund Ost-Region (East Region Transit Authority)
Official site. German only.
Austrian public transport passengers' pressure group.
The Tramway Journal
Vienna tramway information. News, pictures and resources. German only.
tramway.at - Public transport in Vienna
History of the Vienna tramways. Lots of pictures. German only. (Harald A. Jahn)
General City Transit Links
A wealth of resources. Millions of maps and links (Robert Reynolds)
A survey of metros in Europe, America and Asia (Robert Schwandl)
Pictures of European tramways, including Vienna (Leif Spångberg)
Yahoo! Group Stadtverkehr-Austria
City transit in Austria (discussions in German)