India is the 7th largest country in the world located in South Asia. It has a population of over 1 billion people and has a diverse climate and terrain that includes mountains, deserts, and coastal plains. The majority of the population practices Hinduism but there are also significant populations of Muslims, Christians, Sikhs, Buddhists, and Jains. Hindi and English are the official languages although over 1,600 other languages are spoken. The economy is based around agriculture, software development, machinery, textiles, and other major industries. Transportation within India is primarily via railroads, roads, and an extensive merchant marine and air transport system.