telephone answering services; telemarketing services; computerized database management services; teleservicing, in the nature of receiving and responding to telephone and global computer network inquiries from customers of other businesses; employment agency services; advertising agency service, namely, promoting the goods and services of others, through the distribution of printed and audio visual promotional materials and by rendering sales promotion advice and assistance; management of call centers for others; providing customer services, namely, providing information, answering questions, assisting with technical problems, and sales promotion advice for customers of other companies by telephone, global computer network, and video communications