Which organization publishes Handbook 44, providing specifications, tolerances, and other technical requirements for weighing and measuring devices?

• A. American Society for Testing and Materials (ASTM).
• B. National Institute of Standards and Technology (NIST).
• C. International Organization for Standardization (ISO).
• D. Food and Drug Administration (FDA).

Answer: (B)

Handbook 44 is the reference that defines the official specifications, tolerances, and testing procedures for weighing and measuring devices used in commerce. It is published by the National Institute of Standards and Technology (NIST), a U.S. government agency responsible for developing measurement standards. Through this publication and related guidance, regulators and industry ensure devices such as scales, balances, gas pumps, and other measuring instruments meet uniform performance requirements. Other organizations like ASTM, ISO, or the FDA produce standards in different domains, but Handbook 44 is specifically a NIST publication governing U.S. legal metrology.