RadioShack is one of the largest electronic retailers which operate in united states, North America, Europe, Central America, Africa and South America. The company was established in 1921 and the headquarters is located in Fort Worth, Texas. Since its inception the company has grown tremendously and at present it has 4400 stores owned by the company, 688 Kiosks, 1400 outlets and 8 service centers. RadioShack is one of the largest sellers of home appliances, entertainment products, digital cameras, tvs, games, computers, music players, laptop, cell phones, wireless phones and many more. The company has around 37,000 employees. Samsung/RadioShack 500 NASCAR Sprint Cup Series is sponsored by RadioShack. Auvio (Audio/Video Cables and Headphones), Enercell (batteries and power accessories), Gigaware (personal computer and iPod/MP3 player accessories), Kronus (tools), Optimus (formerly audio and PA/DJ equipment), Presidian (audio and video equipment, telephones, flashlights, calculators, and 2-way radios), VoiceStar (wireless phone accessories) are some of proprietary brands of RadioShack.