A Data Entry Operator is a professional who is in charge of entering all the data into different computer databases. In addition, they manage and maintain effective record keeping, organizing files to collect information for future use.A data entry clerk, also known as data preparation and control operator, data registration and control operator, and data preparation and registration operator, is a member of staff employed to enter or update data into a computer system. Data is often entered into a computer from paper documents using a keyboard.