Ordnance Factories Board (OFB) (; IAST: Āyudh nirmāṇī borḍ) consisting of the Indian Ordnance Factories (भारतीय आयुध निर्माणियाँ; Bhāratīya āyudh nirmāṇiyān), is an industrial organisation, functioning under the Department of Defence Production of Ministry of Defence, Government of India. It is engaged in research, development, production, testing, marketing and logistics of a comprehensive 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.