| M-Systems |
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| M.S.Kennedy (MSK) |
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| M/A-Com |
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| Macronix (MXIC) |
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| Magtek |
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| Mai Logic |
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| Marktech Optoelectronics |
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| Marvell |
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| Matrix Memory |
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| Matsushita (-> Panasonic) |
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| Maxim |
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| Maxtek |
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| MAZeT |
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| MCE KDI Integrated Products |
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| Mediamatics (-> National) |
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| MediaQ (-> nVidia) |
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| Melexis |
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| MEMC Electronic Materials |
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| Memsic |
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| Metelics |
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| Micon Design Technology (MDT) |
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| Micrel |
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| Micro Analog Systems (MAS) |
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| Micro Commercial Components (MCC) |
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| Micro Electronics |
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| Micro Linear |
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| Micro Mobio |
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| Micro Networks Corporation (MNC) |
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| Microchip |
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| MicroMetrics |
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| Micron |
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| Micronas |
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| Micronetics Wireless |
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| Micropac Industries |
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| Microsemi |
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| MicroTune |
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| Mindspeed |
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| Mini-Circuits |
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| Mips Technologies |
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| Mitel (-> Zarlink) |
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| Mitsubishi (->Renesas) |
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| Mitsubishi Electric Semiconductor |
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| Mitsumi Electric |
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| MMC Network (-> AMCC) |
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| Mobilink (-> Broadcom) |
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| Monolithics System (MoSys) |
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| Mosaic Semiconductor |
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| MosChip Semiconductor Technology |
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| Motorola (-> Freescale) |
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| Multilink Technology (-> Vitesse) |
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| Murata |
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| Music Semiconductors |
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| Mykotronx (-> Safenet) |
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| Myson Technology |
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