Chitas
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ChiTaS is a Hebrew acronym for Chumash (The five books of Moses), Tehillim (Psalms) and Tanya (Kabbalistic work by Schnuer Zalman of Liadi, the Alter Rebbe). Someone who "does ChiTaS" is someone who studies these works on a yearly cycle. (http://users.resourceinternational.com/~bernard/chitas.html)