DEAR VISTOR , this page includes the following links according to the specified fields:
MOBILE ROBOTS
http://www.robotroom.com/index.html
http://www.robot-electronics.co.uk/
http://www.roboticsconnection.com/
http://www.active-robots.com/
http://www.technobots.co.uk/index.html
http://www.sgbotic.com/
http://www.robotstorehk.com/
MICROCONTROLLER LINKS
http://www.atmel.com/
http://www.8052.com/
http://microchip.com/
http://www.iguanalabs.com/
http://chaokhun.kmitl.ac.th/~kswichit/
ElECTRONIC CIRCUITS
http://www.datasheetcatalog.com/
http://www.alldatasheet.com/
http://www.expresspcb.com/
http://www.pcb123.com/
http://www.doctronics.co.uk/
http://www.the12volt.com/
http://www.hobby-elec.org/e_menu.htm
http://www.jameco.com/
http://www.rapidonline.com/
E_BOOKS
http://www.kutub.info/library/
http://abooks.tipsclub.com/
http://books.electromaniacs.org/category.php?id=5
http://www.freebooksclub.net/category/comp-engineering/
http://www.almdni.com/