Tel: (65) 6748-4310, 6743-4060
                Fax: (65) 6748-3505, 6746-7344

                Contact Person:
                   Managing Director: Mr Tan Huan Tiow
                   Project Director: James Tay
                   Calibration Service - Johnson See
                   Certification & Testing - Max Tan
                   Laboratory Engineering - Lionel Chua
                   Cleanroom Projects - James Tay

                800 East Gan Jiang Road,
                Jing Ye Commercial Building,
                6th Floor, Unit A07,
                Suzhou 215005,
                PRChina

                Tel: (86) 512 6522-3256
                Fax: (86) 512 6522-3245
         

                Contact Person:
                   Mr Chen Sheng Qiang                

      QUEST TECHNOLOGY SHANGHAI

                10B Blk 6,
                1369 Dongfang Road,
                Pudong, Shanghai 200127,
                PRChina

                Tel: (86) 21 5839-7708 / 6864-0335
                Fax: (86) 21 5839-7825

                Contact Person:
                    Mr Chen Sheng Qiang / Mr Danny Lim

      QUEST TECHNOLOGY SHENZHEN

                Room 1702, Middle Tower
                Yue Hai Building, Nan You Road,
                Nanshan District, Shenzhen 518054
                People's Republic of China

                Tel: (86) 755 2643-3512
                Fax: (86) 755 2643-4308

                Contact Person:
                   Mr Luff, Zhang Le Peng

      ASD-QUEST TECHNOLOGY CO., LTD

                International Commerce Building,
                Rm 805-806, Nan Cheng District,
                Hong Fu Road (West),
                Dong Guan City,
                Guangdong Province, PRC

                Tel: (86) 769 2285-9410/420/430
                Fax: (86) 769 2285-9412

                Contact Person:
                    Mr Max Tan Tze Kiang

      QUEST TECHNOLOGY (HK) LTD

                Room 812, 8/F, Block B,
                Po Lung Centre, 11 Wang Chiu Road,
                Kowloon Bay, Kowloon,
                Hong Kong

                Tel: (852) 2690-1362
                Fax: (852) 2690-1370

                Contact Person:
                   Mr Max Tan Tze Kiang / Mr F. S. Wong

      ASD-QUEST TECHNOLOGY CO., (HK) LTD

                Rm 812, 8/F, Block B,
                Po Lung Centre, 11 Wang Chiu Road,
                Kowloon Bay, Kowloon,
                Hong Kong                 

                Tel: (852) 2959-0709
                Fax: (852) 2959-1715                 

                Contact Person:
                   Mr F.S. Wong

      NEXTECH SDN BHD (KL)

                No. 19 Jalan Bukit Badung 26/4
                Seksyen 26
                Hicom Industrial Estate
                40000 Shah Alam , Selangor, Malaysia

                Tel: (60) 02-03-5192-3833
                Fax: (60) 02-03-5192-2088

                Contact Person:
                   Mr Kong Kok San

      NEXTECH SDN BHD (PENANG)

                19 Lintang Beringin 3,
                Diamond Valley Industrial Park,
                11960 Palau Pinang, Malaysia

                Tel: (60) 02-04-626-3939
                Fax: (60) 02-04-626-3940

                Contact Person:
                   Mr Lam Teik Siew

      NEXTECH SDN BHD (JOHOR)

                441A, Jalan Kenanga 29/11,
                Taman Indahpura,
                81000 Kulai,
                Johor, Malaysia

                Tel: (60) 07-661-1139
                Fax: (60) 07-661-1144

                Contact Person:
                   Mr Kong Kok San

      QTS SDN BHD

                20 Jalan TP 7/5,
                SIME UEP Industrial Estate, Seksyen 26,
                40400 Shah Alam,
                Selangor, Malaysia

                Tel: 02-03-5191-7300
                Fax: 02-03-5191-8011

                Contact Person:
                   Mr Alvin Tan C.K.

      QUEST-AIR TECHNOLOGY PHILS., INC.
                Q-TRADE CORPORATION

                Lot 7, 2-A Sooner Farm Compound
                Baranggay Timbao, Binan Laguna
                Philippines.

                Tel: (632) 6700-5163
                Fax: (632) 6700-5162

                Contact Person:
                   Mr Arturo I. Robles, JR.