Data entry is the input of data from various sources into a computer or system, often accomplished by a data entry clerk. A data entry specialist is required to efficiently manage large amounts of information that is sometimes confidential or sensitive in nature. 

There are several types of data entry services. These include basic, online, formatting, conversion, and transcription. Basic data entry involves a specialist reading a document and typing it into processing software. Online data entry involves the entry of information into an online form or portal. Data formatting involves reformatting and correcting or editing. Transcription work involves transcribing audio, whether speeches, discussions, or interviews, into text.