an acronym for Blind Carbon Copy - a copy of original e-mail message to some recipient. It is different from "cc" (Carbon Copy) in the sense that the name of the person is not disclosed in the E-mail message to other recipients.

Making a "bcc" of e-mail messages is a common feature in most of the E-mail client software available.

If you "bcc:" an E-mail message to a person, it means you are sending a replica of the E-mail message to that person in addition to the existing recipients, without disclosing the identity of the person to others.