Talk:Rad (unit)
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Article states that the U.S. is "the only country to still use the rad." In the U.S. medical community the rad is officially considered obsolete, in favor of the Gray (unit) or centigray, although some older physicians use the term out of habit. In Hall's textbook Radiobiology for the Radiologist, Grays and centigrays are primarily used.
Rad is still used by and large in the space industry. In part the industry can be very slow to accept change and part because of the legacy tools and data that are already available. In this case it is not so clear whetehr the benefits of standardising outwiegh the cost and risks of converting all available data and systems currently in place.
