SEDU is a wholly owned subsidiary of Sumitomo Electric Industries (SEI), Ltd. SEI is a member of the 400-year-old family of Sumitomo companies. SEI was established in 1897 to manufacture copper wire and has become one of the world's leading forces in the research and development of high-technology products and systems for the communications, electronics, energy, automotive, and materials industries. SEI oversees more than 200 subsidiaries and affiliated companies worldwide.