Radio Shack opened in 1921 by two brothers, Theodore and Milton Deutschmann, who wanted to provide equipment for the then-nascent field of amateur, or ham radio. The brothers opened a one-store retail and mail-order operation in the heart of downtown Boston at 46 Brattle Street. They chose the name "Radio Shack", which was the term for a small, wooden structure that housed a ship's radio equipment. At its peak in 1999, it had operated stores under either the name RadioShack or Tandy in the United States, Mexico, United Kingdom, Australia, and Canada.