The audio cassette made its U.S. debut in the early 1960s, originally intended for dictating machines. Under what brand name, associated today with consumer products of a different kind, did audio cassettes first appear in America?

How to win: Send your answer, with your full name and address, either by e-mail to TriviaBits@gmail.com, or on a postcard to Stan Newman's Trivia Challenge No. 54, P.O. Box 69, Massapequa Park, NY 11762. Only one submission per person, please. Answers must be received within seven days of publication. One winner will be chosen at random from all correct entries, who will receive a copy of Stan's new book "15,003 Answers: The Ultimate Trivia Encyclopedia," courtesy of Random House. Answer and winner will be announced in a future issue.

Answer to trivia contest No. 47

The nautical mile is almost exactly equal to the average length of one minute (one-sixtieth of a degree) of latitude on the Earth's surface. Winner: Billy Menges of Tucumcari, New Mexico.