Email

CC stands for Carbon Copy which means you can send the email to more than 1 person by putting their email in the CC bar. (brain)

you would use it when you want to send a message to more than one person. (brain)

The term carbon-copy derives from carbon-paper, which was, and occasionally still is, used to make copies of typewritten documents. The paper, which was originally developed so that blind people could write without the need for pen and ink, is a thin paper which is coated with a mixture of wax and pigment. (http://www.phrases.org.uk/meanings/carbon-copy.html)

BCC is BCC is an abbreviation used in email, which means simply Blind Carbon Copy. (http://www.wisegeek.com/what-is-bcc.htm)