TiSi is the abbreviation of Thai Industrial Standards Institute. TiSi is mainly responsible for consumer protection, environmental protection, industrial development, competitiveness in the world, fair trade and standard setting in Thailand. TiSi divides the products. Some of the products that enter Thailand for sale must obtain compulsory certification marks. Other parts can obtain voluntary marks. For the marks of EMI and EMS, they can also apply according to customer needs. When entering Thailand, the products meet IEC standards, they must also meet Thailand's TiSi standards.