Product Design and Development - www.pddnet.com/
MotionNet.com - Engineering Resources Online www.motionnet.com
The Mechanical Engineering Portal www.icrank.com
National Institute of Standards and Technology www.nist.gov
Technical Work Forums for Engineering Professionals http://www.eng-tips.com
Parts / Materials / Equipment:
www.mcmaster.com ...The most extensive hardware and
equipment catalog we've found.
MSC Industrial Supply Co.
...An equally impressive catalog-- heavy on tools.
Aircraft Spruce & Specialty Co. www.aircraftspruce.com
--Not just for pilots-- good source for specialty materials, fasteners,