Timeline of Indian innovation

Timeline of Indian Innovation encompasses key events in the history of technology in the subcontinent historically referred to as India and the modern Indian state.
The entries in this timeline fall into the following categories: architecture, astronomy, cartography, metallurgy, logic, mathematics, metrology, mineralogy, automobile engineering, information technology, communications, space and polar technology.
This timeline examines scientific and medical discoveries, products and technologies introduced by various peoples of India. Inventions are regarded as technological firsts developed in India, and as such does not include foreign technologies which India acquired through contact.