51.   The three are Ziff-Davis Publishing, the leading provider of computer magazines in the United States, computer trader show operator Comdex, and Softbank Forums.

52.   They are the leading providers of cell phone service in Nigeria, Uganda and Cameroon.

53.   They also hope to cement a position as a leading provider of equipment for studios.

54.   They are the leading providers of cellphone service in Nigeria, Uganda and Cameroon.

55.   This Houston firm is the leading provider of pressure pumping to gas wells in Canada and one of the biggest in the U.S. and Latin America.

56.   Until very recently, his company had the most closed system of the three leading providers.

57.   Uunet in the last year acquired Internet service providers in the U.K., Germany, Belgium and Luxembourg, and is now among the leading providers in each country.

58.   Waste Management is a leading provider of waste collection and disposal services.

59.   Western also intends to become a leading provider of security-monitoring providers in the U.S.

60.   Western intends to become a leading provider of security-monitoring providers in the U.S.