Ordnance Factory Board (OFB) consisting of the Indian Ordnance Factories is a Government agency under the control of department of defence production (DDP) Ministry of Defence (MoD), Government of India. It is engaged in research, development, production, testing, marketing and logistics of a product range in the areas of air, land and sea systems. OFB comprises forty-one ordnance factories, nine training institutes, three regional marketing centres and four regional controllerates of safety, which are spread all across the country. Every year, 18 March is celebrated as the Ordnance Factory Day in India.