RadioShack (formerly written as Radio Shack) is an American electronics retailer that was established in 1921 as a mail-order business focused on amateur radio. Its parent company was purchased by Tandy Corporation in 1962; Tandy ended mail order, shifted to retail by opening small stores staffed by people who knew electronics, greatly reduced the number of items carried, and replaced name-brand products with private-label items from lower-cost manufacturers. These moves were successful and the brand grew.
In the late 1970s, the company branched into personal computers, and in the 1990s, it began to focus on wireless phones and de-emphasize the hobbyist market. RadioShack reached its peak in 1999, when Tandy operated over 8,000 stores in the United States, Mexico, and Canada, and under the Tandy name in The Netherlands, Belgium, Germany, France, the United Kingdom, and Australia. However, its sales strategy increasingly competed with big-box stores and dedicated wireless phone retailers, and it fell into decline.