What does the “A” in the acronym SCUBA stand for?
The acronym S.C.U.B.A stands for Self-Contained Underwater Breathing Apparatus, although it is usually spelled uppercase without the periods. In 1954, the term SCUBA was coined by Dr. Christian Lambertsen while attending the University of Pennsylvania Medical School. Lambertsen was working on the first prototypes of military equipment for the US Navy when he created the Lambertsen Amphibious Respiratory Unit, otherwise known as the Lambertsen Lung. He then gave these devices the military code name of S.C.U.B.A. He later changed his invention's name to SCUBA.
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