Dallas is one of the largest markets for oil in the country, making it the U.S. headquarters to more large oil companies than any other city in the nation. Boasting the largest convention center in Texas and several cultural activities, such as The Museum of Fine Art and the Dallas Opera, Dallas draws hundreds of thousands of business and vacation visitors each year.The area is also the Southwest's largest wholesale trade center and one of the region's major retail trade centers. Dubbed the "Silicon Prairie," Dallas is among the largest employment centers in the U.S. for high technology. The Dallas suburbs of Richardson and Plano represent the largest concentration of telecommunications firms in the country.Major employers within Dallas include AMR Corporation, Alcatel USA Inc., Belden Wire and Cable, Delta Airlines, EDS, Electronic Catalog Service, Nortel Networks, Inc., Parkland Health & Hospital Systems, Presbyterian Hospital Dallas, Texas Instruments, and WTG.The Dallas Business Journal is in the Dallas - Fort Worth, TX DMA. The Dallas Business Journal is part of the City Business Journal Network and offers ROP and insert advertising opportunities in its daily circulation. Echo Media has direct relationships with over 7,500 newspapers providing tremendous local coverage.