When sending an email, CC stands for Carbon Copy and BCC stands for?

BCC(Blind carbon copy)
Meaning: a copy of a message (such as an e-mail) that is sent without the knowledge of the other recipients.
For security and privacy reasons, it is best to use the Blind Carbon Copy (BCC) feature when sending an email message to a large number of people.
When you place email addresses in the BCC field of a message, those addresses are invisible to the recipients of the email.;
Conversely, any email addresses that you place in the To field or the CC field are visible to everyone who receives the message.