Also known as enhanced service. Services that alter the form, content, or nature of the information, thereby adding value to it. Examples include store-and-forward services such as voice mail, e-mail, and fax mail. Voice mail systems, for example, cannot only store messages for subsequent retrieval, but also often allow a user to annotate a message before forwarding or archiving it. Some voice messaging systems even perform language translation.Voice-to-text capability allows the user to request that the system convert a voice message to text format and then send it via e-mail. Similarly, unified messaging systems can convert e-mail to voice format, fax mail to e-mail or voice format, and so on. See also basic service, e-mail, facsimile, store-and-forward, and voice mail.