Stigma (letter) sigma form ς never occurs inside a word and is never used as a numeral either. Uppercase forms of stigma as a numeral (Ϛ) are rare in practice; when they occur, they can often be confused with uppercase forms of another numeral symbol, koppa (Ϟϟ), which stands for 90. Stigma is encoded in Unicode as "Greek letter stigma" U+03DA (Ϛ) and "Greek small letter stigma" U+03DB (ϛ). Stigma (letter) Stigma (ϛ) is a ligature of the Greek letters sigma (Σ) and tau (Τ), which was used in writing Greek between the Middle Ages and the 19th century. It is also
Hazing in Greek letter organizations members or pledges, as part of their hazing rituals. Many educational institutions have developed anti-hazing programs, which encourage alternatives to hazing through the planning of purposeful activities, inform students of how to take action and avoid being a bystander, and provide clear consequences for those students and/or organizations who violate hazing policies . Additionally, hazing has become a central focus of programs designed to help Greek letter organizations become more value congruent through institutionalized standards and expectations . Attempts at preventing hazing have also targeted Greek letter organizations at the national level. note the important role of culture change within