Machine Tools
+GF+
and in particular Agie Charmilles
EDM machines
Databases of mechanical industries
A large database of mechanical companies: manufacturing, standard parts etc.. mechanical.com
AIAG Online
Automotive Industry Action Group. The mission of the AIAG is to improve the global productivity of its members and the North American automotive industry. They are developing an AutoSTEP section about exchange of CAD data using STEP.
GarnerWeb
Metalworking and Finishing Publisher. with interesting information on fair
Newsgroups
Theory You need to have a minimum of knowledge in the field your application is targeting