| YCC Optical Manufacturer ( Pullman, WA ) | YCL Electronics Co., Ltd. ( Feng Shan, Kaohsiung County ) | YDI Wireless, Inc. ( Falls Church, VA ) |
| YCC Products Inc. ( Placentia, CA ) | YCL Electronics Co., Ltd. ( Feng Shan City, TW ) | YDI Wireless, Inc. ( Northampton, MA ) |
| YCD LTD. | YCL Mechanical Co., Ltd.( Niaosong Hsiang ) | YDI Wireless, Inc. ( S. Deerfield, MA ) |
| YCD Ltd.( Herzlia ) | YCM Co., LTD. | YDI Wireless, Inc. ( South Deerfield, MA ) |
| YCD Ltd. ( Herzlia, IL ) | YD, Ltd. ( Fukuoka, JP ) | YDI Wirelesss, Inc. ( South Deerfield, MA ) |
| YCD Multimedia Ltd.( Herzliya ) | YD, Ltd.( Ikoma ) | YDREAMS INFORMATICA, S.A. ( Costa da Caparica, PT ) |
| YCD MULTIMEDIA LTD. ( Shefayim, IL ) | YD, Ltd. ( Ikoma-city, JP ) | YDREAMS-INFORMATICA, S.A. ( Costa da Caparica, PT ) |
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