bcc

Like carbon copy (cc), this e-mail option lets you send the same message to many different addresses. The difference is that when you put a recipient's e-mail address in the bcc field, the cc'd recipients cannot see the bcc'd e-mail addresses and don't know that someone else received it. For example, if you want to send a letter to your boss but you also want your girlfriend to read it, you can put her e-mail address in the bcc field. That way, both she and your boss will receive the message, but your boss won't know she received it also.

Online jargon, also known as text message shorthand, used in texting, online chat, instant messaging, email, blogs, and newsgroup postings, these types of abbreviations are also referred to as chat acronyms.