| 1980 | - Company established May 30 th
- October: Acquired Samsung semiconductor authorized distributorship
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1982 | - Nov.: Sales of STMicroelectronics products began
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1991 | - Establishment of regional office in Singapore
- Establishment of regional office in Penang, Malaysia
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1994 | - Awarded as Samsung's biggest semiconductor distributor in the Asia Pacific region
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1995 | - Establishment of regional office in Hong Kong
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1997 | - June: Awarded Stmicroelectronics semiconductor authorized distributorship for the Asia Pacific region
- Established regional office in New Delhi, India
- Established regional office in Shenzhen, China
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| 1998 | - October: Construction of Yosun business building began
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| 1999 | - April: acquired Fairchild semiconductor authorized distributorship
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| 2000 | - March: Yosun IPO
- Established Xiamen regional office in Chia
- Completion of Yosun business building
- Oracle ERP system became operational
- Combined business group revenue surpassed NT$10 billion to reach NT$17.655 billion
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| 2001 | - Acquired authorized distributorship from Diodes Incorporated, EMC, Semco etc.
- Established regional office in Bangalore, India
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2002 | - Acquired authorized distributorship of Samsung semiconductors in China
- Established regional office in Shanghai
- Established regional office in Bangkok, Thailand
- Combined business group revenue surpassed NT$20 billion to reach NT$24.379 billion
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| 2003 | - Acquired authorized distributorship from ASIX, PDC, INPROCOMM, Mobile Doctor etc.
- Established regional office in Suzhou, China
- Combined business group revenue surpassed NT$ 30 billion to reach NT$ 30.097 billion.
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2004 | - Acquired authorized distributorship from Foxconn, System General, SiliconFile etc.
- Established regional office in ShinYokohama, Japan
- Established regional offices in Nanjing, Ningbo, and Guangzhou
- Established Yosun-Atek ( Elite Semiconductor Memory Technology Inc) and acquired authorized distributorship of Texas Instruments in Hong Kong and China
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2005 | - Acquisition of SMSC’s power of attorney
- Participation in capital increase and becoming shareholder of Siltrontech Electronics Corp.
- The revenue of business merger reaches NTD47.69 billion.
- Acquisition of Gold Insignia Electronic Co. Ltd. and power of attorney of IT product line in the mainland of China.
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2006 | - Acquired the agency of TI product lines in the territory of Taiwan
- Consolidated revenue amounted to NTD 67.9 billion
- Incorporation of the base in Hangzhou, China
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2007 | - Acquired and merged Sertek Inc., the distributor of Acer
- Consolidated revenue amounted to NTD90.4 billion
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