28 August
Free bilingual TNPSC study notes on the Indus Valley (Harappan) Civilisation — discovery, chronology, town planning, major sites like Mohenjo-daro, Lothal and Dholavira, economy, script and decline. Includes 14 key points, detailed notes in English and Tamil, 5 practice MCQs, memory tips and previous year questions for TNPSC Group 1, 2, 2A, 4 and VAO.