A comment attached to a particular section of a document. Many computer applications enable you to enter annotations on text documents, spreadsheets, presentations, and other objects. This is a particularly effective way to use computers in a workgroup environment to edit and review work. The creator of a document sends it to reviewers who then mark it up electronically with annotations and return it. The document's creator then reads the annotations and adjusts the document appropriately.
Many modern applications support voice annotations. If the computer is equipped with a microphone, the reviewer can voice his comments orally instead of writing them. These voice annotations are digitized and stored with the document. When a reader of the document selects the annotation icon, the spoken message is played back through the computer's speakers.