Overview

Indian Knowledge Systems (IKS) encompass the vast body of intellectual, scientific, technological, and philosophical knowledge developed on the Indian subcontinent over more than four millennia. Distinct from the philosophical schools covered under the six Darshanas, IKS focuses on India's applied and empirical traditions: the decimal place-value system and zero that transformed world mathematics; astronomical observatories from Vedanga Jyotisha to Jantar Mantar; Ayurveda's codified medical science; metallurgical feats like the rust-resistant Iron Pillar and high-carbon Wootz steel; Panini's generative grammar of Sanskrit; Kautilya's science of statecraft in the Arthashastra; Patanjali's systematic Yoga; traditional ecological knowledge embedded in centuries of land-use practice; and the architectural science of Vastu Shastra and Harappan town planning. Recognised prominently in NEP 2020, IKS is increasingly relevant for UPSC GS-1 (Indian heritage and culture) and GS-3 (science and technology). Questions in this area test specific scholars, their works, and the global impact of India's intellectual heritage.

Chapters

# Chapter Key Topics
1 Vedic Mathematics & India's Contribution to Numbers Zero (Brahmagupta), decimal place-value system, Aryabhata, Sulbasutras, Mahavira, Bhaskara II, Kerala School (Madhava), Hindu-Arabic numerals
2 Indian Astronomy — Vedic Tradition to Jantar Mantar Vedanga Jyotisha, Aryabhatiya, Varahamihira, Brahmagupta, Jai Singh II, five Jantar Mantars, Samrat Yantra, UNESCO inscription 2010
3 Ayurveda — Charaka, Sushruta & Indian Medical Tradition Tridosha theory, Charaka Samhita, Sushruta Samhita, rhinoplasty, Vagbhata, Nagarjuna, AYUSH Ministry (2014), WHO recognition
4 Indian Metallurgy — Iron Pillar, Wootz Steel & Ancient Technology Iron Pillar of Delhi (Gupta era), Wootz/crucible steel, Damascus steel connection, Zawar zinc smelting, forge welding
5 Sanskrit Grammar, Panini & Indian Linguistics Tradition Ashtadhyayi (3,959 sutras), Panini as first descriptive linguist, Patanjali's Mahabhashya, Bhartrhari, Vyakarana Vedanga, NEP 2020
6 Arthashastra — Kautilya's Science of Statecraft & Economics 15 books, rediscovery 1905, saptanga theory (7 elements), mandala theory, taxation, espionage, comparison with Machiavelli
7 Yoga, Siddha & Indian Mind-Body Knowledge Systems Yoga Sutras of Patanjali, 8 limbs, International Day of Yoga (UN 2014), Siddha medicine (18 Siddhars), Unani, AYUSH
8 Traditional Ecological Knowledge & India's Biodiversity Heritage Sacred groves, johad/kuhl/tanka/stepwells, Biodiversity Act 2002, PBRs, biopiracy (turmeric, neem), TKDL, IPBES
9 IKS Institutionalisation — NEP 2020, AYUSH & Global Recognition IKS Division (Oct 2020), NEP 2020 Chapter on IKS, WHO Traditional Medicine Strategy, yoga diplomacy, soft power
10 Vastu Shastra, Town Planning & Architectural Science in Ancient India Manasara text, Sthapathya Veda, Harappan town planning, Pataliputra (Megasthenes), Rani ki Vav (UNESCO 2014), Vastu vs modern architecture