1. 
   Sigma Alpha Epsilon Pi
   Sigma Alpha Epsilon Pi is a United States sorority that was founded on October 1, 1998 at the University of California, Davis. ==Formation== In the early 1990s with the closing of a national Jewish sorority the University of California, Davis was left without a Jewish women`s social organization. W...
   Found op http://en.wikipedia.org/wiki/Sigma_Alpha_Epsilon_Pi
   
   
2. 
   Sigma delta pi
   Sun Wu ({zh-tsp|t=孫武|s=孙武|p=Sūn Wǔ}), style name Changqing (長卿), better known as Sun Tzu ({zh|t=孫子|s=孙子|p=Sūn Zǐ}; pronounced swə́n tsɨ̀), was an ancient Chinese military general and strategist and philosopher who is traditionally believed to have authored The Art of War...
   Found op http://en.wikipedia.org/wiki/Sigma_delta_pi
   
   
3. 
   Sigma Delta Pi
   Sigma Delta Pi, the National Collegiate Hispanic Honor Society (La Sociedad Nacional Honoraria Hispánica), was established on November 14, 1919, at the University of California at Berkeley. Its insignia is the royal seal of Fernando and Isabel, representing Castille, León and Aragón. The Society...
   Found op http://en.wikipedia.org/wiki/Sigma_Delta_Pi
   
   
4. 
   Sigma Omicron Pi
   ==History== The sisterhood of Sigma Omicron Pi was established at San Francisco State University in 1930 by ten Asian American Women pursuing the interest of teaching. They chose the Greek letters, Σ, Ο and Π to represent themselves as the "Sisters of Pedagogy." The Constitution was derived from...
   Found op http://en.wikipedia.org/wiki/Sigma_Omicron_Pi
   
   
5. 
   Sigma Pi
   Sigma Pi (ΣΠ) is an international college secret and social fraternity founded in 1897 at Vincennes University. Sigma Pi International fraternity currently has 127 chapters and 6 colonies in the United States and Canada and is headquartered in Brentwood, Tennessee. Like most social fraternities, ...
   Found op http://en.wikipedia.org/wiki/Sigma_Pi
   
   
6. 
   Sigma Thêta Pi
   Sigma Thêta Pi (ΣΘΠ, STPi), is an international student fraternity based in Quebec (Canada) and France, which was founded in 2003. ==History== In 2003, four students decided to create a fraternity in the French educational system which doesn`t possess any. This fraternity is the only one to hav...
   Found op http://en.wikipedia.org/wiki/Sigma_Thêta_Pi
   
   
7. 
   sigma, pi
   The terms are symmetry designations, pi molecular orbitals being antisymmetric with respect to a defining plane containing at least one atom (e.g. the molecular plane of ethene), and sigma molecular orbitals symmetric with respect to the same plane. In practice the terms are used both in this rigoro...
   Found op http://www.chem.qmul.ac.uk/iupac/gtpoc/SaSp.html
   
   

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