Amdocs is a multinational corporation headquartered in Chesterfield, Missouri, with support and development centers located worldwide. The company specializes in software and services for communications, media and financial services providers and digital enterprises. Its offerings include business support systems (BSS), operational support systems (OSS), open network solutions, Internet of Things, big data analytics and entertainment and media solutions. The company has a customer base of over 350 customers in more than 85 countries. Amdocs went public in 1998 and its ordinary shares are listed on the NASDAQ Global Select Market under the symbol DOX. The company was founded in 1982 as an offshoot of Golden Pages, the Israeli phone directory company, which was owned by the Aurec Group headed by Morris Kahn. Together with others at Golden Pages, Kahn developed a billing software program for phone directory companies and with Boaz Dotan established a company called Aurec Information & Directory Systems to market this product. In 1985, Southwestern Bell Corporation acquired a 50 percent ownership share of Aurec Information & Directory Systems, and its name was changed to Amdocs. Within two years, the Aurec Group sold off all its holdings in Amdocs for almost US$1 billion. Between 1990 and 1995 Amdocs took its initial diversification steps, expanding first into the wireline telephony arena and then the mobile space. Over the years, Amdocs has continued to expand its product and services offerings, both organically and through a series of acquisitions, including ITDS, Clarify, DST INNOVIS, Cramer, Actix, Celcite, Utiba, Comverse BSS assets, Vindicia, Brite:Bill and Pontis. The company went public on the New York Stock Exchange in June 1998, moving to the NASDAQ Global Select Market in 2014.