telephone directory information services via telephone and computer, preparation and placement of advertisements for others, and consulting related thereto; promoting the goods and services of others by providing discounts through the use of membership cards; managing telecommunications systems and equipment for others; business management consulting services; billing services; providing statistical information; data processing services in the field of communications; retail store services, namely, telephone stores specializing in telecommunications equipment; on-line retail stores featuring a wide variety of goods and services; leasing business equipment; preparation and placement of telephone directory advertisements for others