OPTRONIX - Integrated Photonic Circuits
One of branches of photonics is optronics, that is the development of integrated logical circuits in which light, not electricity, travel.
http://www.optronix.ca

California Micro Devices Corporation
Designs, manufactures and markets thin film passive devices, resistors, resistor networks, telecommunication integrated circuits, microprocessors and other integrated circuits. (Nasdaq: CAMD).
http://www.camd.com/

Microtronics, Inc.
Provides photomasks to various industries that include: integrated circuits, resistor networks, hybrid circuits, RF transistors, power devices, and optical devices.
http://www.microtronicsinc.com/

Nippon Precision Circuits, Inc.
Nippon Precision Circuits integrated circuits oscillator RTC DVD audio CD digital filter power converion DC to DC manufacturer. JRC or NJR or PhaseLink are sometimes confused with NPC. Crystal blanks for sensor filter and oscillator applications using inverted mesa designs to build high frequncy blanks. The unique inverted mesa crystal blanks mfg approach create defect-free crystals for MHz and GHz applications in oscillator, TCXO VCXO XO filter and biochemical sensor or temperature sensing or physical sensor applications. Some spell us ZECO and confuse us with Global Supply Micro Crystal or Connor Winfield. XECO is independent
http://npcamerica.com

Maxim Integrated Products
Over 5700 analog and mixed signal ICs in 28 categories. Design tools, free samples, and thousands of application notes. A $2B company.
http://www.maxim-ic.com/

Maxim Integrated Products, Inc.
Over 5700 analog and mixed signal ICs in 28 categories. Design tools, free samples, and thousands of application notes. A $2B company.
http://www.maxim-ic.com/

Integrated Hydraulics
Integrated Hydraulics
http://www.integratedhydraulics.com

Integrated Silicon Solution, Inc.
ISSI designs and manufactures high performance memories, SRAM, DRAM, EEPROM, Smart Cards, SigmaRAM, E2 Memories
http://www.issiusa.com/

Printech Circuit Laboratories
Printech manufacturer of high technology printed circuit boards
http://www.pcll.net/

Lessons in Electric Circuits
Online book by Tony R. Kuphaldt on dc and ac electric circuits, semiconductor devices, analog and digital circuits.
http://www.allaboutcircuits.com/