write a short note on ISI.
ISI mark is a certification mark for industrial products in India. The mark certifies that a product conforms to a set of standards laid by the Bureau of Indian Standards (BIS), the national standards organization of India. The ISI mark is by far the most recognized certification mark in the Indian subcontinent. The name ISI is an abbreviation of Indian Standards Institute, the former name of the Bureau of Indian Standards. The ISI mark is mandatory for certain products to be sold in India, like most of the electrical appliances viz; switches, electric motors, wiring cables, heaters, kitchen appliances etc., and other products like portland cement, LPG valves, LPG cylinders, automotive tyres etc. But in the case of most other products it serves only a consumer advisory status.