This document defines key terms related to primary markets and book building process for public issues. It outlines three main categories of investors - retail individual investors, non-institutional investors, and qualified institutional buyers. For book built issues, no less than 35% of shares must be allotted to retail investors, 15% to non-institutional investors, and no more than 50% to qualified institutional buyers. The document also defines important documents like prospectus and red herring prospectus, as well as terms like green shoe option, sweat equity, and basis of allotment.