Zilda Arns (1934–2010), Brazilian pediatrician and aid worker
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Paulo Evaristo Arns (born 1921), Brazilian Roman Catholic archbishop and cardinal
Arns also expressed a political opinion in criticising the President of the United States, George W. Bush.
R. G. Arns, "The other transistor: early history of the metal-oxide-semiconductor field-effect transistor," Engineering Science and Education Journal, 7, No. 5 (October, 1998): 233-240