Healthcare administration or healthcare management is the field relating to leadership, management, and administration of public health systems, health care systems, hospitals, and hospital networks.

A call centre or call center is a centralised office used for the purpose of receiving or transmitting a large volume of requests by telephone. wikipedia.org

A call centre or call center is a centralised office used for the purpose of receiving and transmitting a large volume of requests by telephone. A call centre is operated by a company to administer incoming product support or information inquiries from consumers. wikipedia.org

A secretary, or administrative assistant, is a person whose work consists of supporting management, including executives, using a variety of project management, communication & organizational skills. wikipedia.org

A data entry clerk, sometimes called a typist, is a member of staff employed to type data into a database using a keyboard. The keyboards used can often have specialist keys and multiple colours to help them in the task and speed up the work. wikipedia.org

Customer service is the provision of service to customers before, during and after a purchase. wikipedia.org