In the context of US export controls, BIS is the abbreviation for the US government body Bureau of Industry and Security. The BIS is part of the US Department of Commerce. The Bureau of Industry and Security administers the Export Administration Regulations (EAR) – the US export control law for the export, reexport, and transit (in country) of US products (commodities, software, and technologies) that are subject to the jurisdiction of the US EAR.
It is the BIS’ mission to ensure an effective export control and treaty compliance system and promote continued US strategic technology leadership. In addition, the Bureau of Industry and Security is also tasked with enforcing anti-boycott laws and coordinating with US agencies and other countries on matters around export controls, non-proliferation of weapons of mass destruction, and strategic trade.
Outside of the Bureau of Industry and Security, other US government agencies regulate more specialized exports such as defense articles and services, which are subject to the authority of the US Department of State’s Directorate of Defense Trade Controls. You can find a list of other agencies involved in US export controls on the BIS website or in Supplement No. 3 to Part 730 of the EAR.