Circuit Exchange International
Electronic and Radio schematics, Design,Theory,Circuit Analysis
http://www.mitedu.freeserve.co.uk/

Circuit Breaker Industries Ltd - CBI
Manufacturer of miniature and moulded case circuit breakers for overload and short circuit protection. From South Africa.
http://www.atc.co.za/

Littelfuse Circuit Protection
Littelfuse is the world leader in circuit protection offering Automotive Fuses, Automotive Circuit Protection, Fuses, Electrical Fuses, Thyristors and more.
http://www.littelfuse.com/

Circuit Sage
Tools and links for RF/analog circuit design and analysis.
http://www.circuitsage.com/

Edge Circuit Technology
ECT offers consignment and turnkey project solution services. We will customary address testability, material savings, and manufacturability issues to assist our customers. Our extensive manufacturing experiences and consistent processes enable us to reinforce high standards at every stage of production. Our ultimate objective is to offer a wide range of services and to deliver quality products with total yield outcome to fulfill our customers’ go-to-market needs.
http://www.edgecircuit.com

Ace Tech Circuit
Korean manufacturer of printed circuit board materials, chemicals and supplier of printed circuit boards.
http://www.koreapcb.com/

Advance Circuit Technology, Inc.
Contract electronic manufacturing and thickfilm hybrid design located in Rochester New York. Complete turnkey solutions from prototype to production.
http://www.advcircuit.com

PCB Design and Fabrication
Provides price quotes for circuit board manufacturing; lists circuit board (PCB) and semiconductor companies, and includes general design guidelines for circuit boards.
http://www.pcbdesignandfab.com/

Advanced Microcomputer Systems
Software offers complete high performance solution for electronics design using personal computers. Includes Schematic Design,Capture, Symbol Editor, PCB Design and Layout, and Automatic Routing.
http://circuitcreator.com

Analog and Digital Circuit Design
Professional Services in Analog and Digital circuit design, Printed Circuit board layout, and Embedded Controller hardware/software.
http://www.brannonelectronics.com