India has a rich history of scientific and technological advancements dating back to ancient times. The concept of zero, decimal system, and the use of numbers for mathematical calculations were invented in India. Ancient Indians were advanced in the field of astronomy. The ancient Indian architecture was highly advanced. The ancient Indians developed sophisticated techniques to manage water resources. Overall, the ancient Indians made significant contributions to the fields of science and technology. This book attempts to describe the historical events in the history of India that have proved that India has been very rich in science and technology since ancient times.