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What Do cc: and bcc: Mean
Email writing has become a large part of modern communication, particularly in business. The world has become much smaller now that we have the ability to send and receive email messages over great distances at an incredible speed. Due to the ease of use it has the potential to be abused and you should try to keep the following points in mind when writing email.
There is a certain etiquette(礼节) with email, especially in the use of the carbon copy (cc:) and blind carbon copy (bcc:) fields. It is courteous to add addresses to the ’cc:’ field if those people need to know about the subject but are not required to act on the contents.

The ’bcc:’ field is useful where discretion is required. People in this field are concealed from other recipients in the ’ To’, ’ cc:’ and ’ bcc:’ fields. They can themselves see others in the ’To’ and ’cc:&rsqu