Voice-Over Acting at a Glance. Voice-over actors, sometimes called just voice actors, provide vocal talent for a project without their faces ever being seen. Many industries use the work of voice-over actors, including commercials, radio, movie trailers, sports broadcasts, documentaries, and animated movies. Data Entry Operators are usually responsible for entering data into different computer databases, manage and maintain effective record keeping. In addition, they may be responsible for organizing files, collecting and managing data to be entered into the computer.