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The Fahrenheit scale was the primary temperature standard for climatic, industrial and medical purposes in most English-speaking countries until the 1960s. In the late 1960s and 1970s, the Celsius (formerly Centigrade) scale was adopted by most of these countries as part of the standardizing process called metrication (or metrification).

Only in the United States and a few other countries (such as Belize) does the Fahrenheit system continue to be used, and only for non-scientific use. Most other countries have adopted Celsius as the primary scale in all use.

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Q: What is used in the U.S Celsius or Fahrenheit?
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