ASTM (American Society for Testing and Materials) and ISO (International Organization for Standardization) are two prominent organizations that develop technical standards for various industries. While ASTM primarily focuses on standards relevant to industries within the United States, ISO standards have international relevance and are adopted by countries worldwide. ASTM covers a wide range of industries and has over 12,000 standards, whereas ISO develops standards for almost all sectors and has over 23,000 international standards. Both organizations use different naming conventions for their standards, and while ASTM standards are widely used and respected globally, ISO standards are the most widely accepted and implemented global standards.