ASNI is a non-profit organization that develops and promotes standards for industry in the United States. It also coordinates with the International Organization for Standardization (ISO) to ensure that US products are usable world-wide.
ISO creates documents that provide requirements, specifications, guidelines or characteristics that can be used consistently to ensure that materials, products, processes and services are fit for their purpose.
NIST is a non-regulatory federal agency within the U.S. Department of Commerce. NIST's mission is to promote U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life.