Akin to CERTs, Information Sharing and Analysis Centers (ISACs) help develop and promulgate "best practices" for protecting critical infrastructures and minimizing vulnerabilities. Many industries have established ISACs to allow these critical sectors to share information and work together to help better protect the economy.
In the United States, Presidential Directive Number 63 and the Patriot Act establish that the ISACs will receive governmental sponsorship. The Department of Homeland Security lists links to various industry ISACs on its web site. ISACs are established for the food industry, water industry, emergency services (police and fire), state governments, and the telecommunications and information technology industries. There are also ISACs in place for the energy, transportation, banking and finance, chemical, and real estate industries.