Email management is a specific field of communications management
A researcher is someone who conducts research, i.e., an organized and systematic investigation into something. Scientists are often described as researchers.
Marketing is a widely used term to describe the communication between a company and the consumer audience that aims to increase the value of the company or its merchandise or, at its simplest, raises the profile of the company and its products in the public mind.
A data entry clerk, similar to a typist, is a member of staff employed to enter or update data into a computer system database, often from paper documents using a keyboard, optical scanner, or data recorder.