The island of Diego Garcia is an atoll that is part of the British Indian Ocean Territories, known for the presence of the United States Navy military base, one of the most important US forces bases in the world. A telephone system that used the magnetic cards provided by Autelca was installed in 1985 and used until the end of the 90s. The first four cards issued, with values of 17, 50, 100 and 200 units, were the classic cards with the logo of the Cable & Wireless, which provided telephone services, also used in several other countries: those of Diego Garcia are recognized for having the control number prefixed by the letter D.
