Food processing involves transforming raw ingredients into food through physical or chemical means. It started in prehistoric times with methods like fermenting and sun drying. Modern food processing developed in the 19th-20th centuries partly to serve military needs and has grown rapidly since. Food processing provides employment, helps curb food inflation by reducing waste and middlemen, allows crop diversification, and utilizes India's abundant raw materials and geographical advantages. The government is also supporting the sector through various initiatives. Major food processing companies contribute significantly to India's GDP, which is expected to make the industry worth $258 billion by 2015.