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2. APC by Schneider Electric - Wikipedia

   en.wikipedia.org/wiki/APC_by_Schneider_Electric

   APC was founded in 1981 by three MIT Lincoln Lab electronic power engineers. Originally, the engineers focused on solar power research and development. [2] When government funding for their research ended, APC shifted its focus to power protection by introducing its first UPS in 1984.

3. Zigzag transformer - Wikipedia

   en.wikipedia.org/wiki/Zigzag_transformer

   A zigzag transformer winding is a special-purpose transformer winding with a zigzag or "interconnected star" connection, such that each output is the vector sum of two (2) phases offset by 120°. [1]

4. Upsilon Phi Sigma - Wikipedia

   en.wikipedia.org/wiki/Upsilon_Phi_Sigma

   Upsilon Phi Sigma, (ΥΦΣ) abbreviated as UPS, is a Philippine inter-university and collegiate fraternity and sorority which claims to have been established in the University of the Philippines Los Baños on February 14, 1935. However, this assertion has been questioned because there is no record of Upsilon Phi Sigma at the University of the ...