Many useful electronic components Online trading platform

I've done a lot of electronic components Online trading platform. Here are some of the sites that I use frequently. Avoid Radio Shack at all costs unless absolutely necessary,these platform supply ic parts,I hope can help everyone.,

Digikey Electronics http://www.digikey.com
Allied Electronics http://www.alliedelec.com
Jameco Electronics http://www.jameco.com
Mouser Electronics http://www.mouser.com
Newark Electronics http://www.newark.com
PI Manufacturing http://www.pimfg.com
Relay Specialties http://www.relayspec.com
Automation Direct http://www.automationdirect.com
Robot Marketplace http://www.robotmarketplace.com
Grainger Industrial Supply http://www.grainger.com
Markertek Electronics http://www.markertek.com
BTX Technologies http://www.btx.com
Local stores in Rochester, NY, USA
Goldcrest Electronics http://www.goldcrestelectronics.com
Glenwood Sales and Surplus http://glenwoodsales.com/
Simcona Electronics http://www.simcona.com