The ISI mark is a standards-compliance mark for industrial products in India since 1950. The mark certifies that a product conforms to an Indian standard (IS) developed by the Bureau of Indian Standards (BIS), the national standards body of India.[1] The ISI mark is by far the most certification mark in the Indian subcontinent. The ISI is an initialism of Indian Standards Institution, the name of the national standards body at 1 January 1978, when it was renamed to the Bureau of the Indian Standards. The ISI mark is mandatory for a certain products to be sold in India, such as many of the electrical appliances[2] like switches, electric motors, wiring cables, heaters, kitchen appliances, etc., and other products like Portland cement, LPG valves, LPG cylinders, automotive tyres,[3] etc. In the case of most other products, ISI marks are optional.[4][5]