Include discreetly in an email, for short

• Bring into the conversation, quietly
• Discreetly include on an email
• Secretly address an email to: Abbr
• Loop in secretly, in a way
• Keep apprised, in a way
• Covert message inclusion
• Private email attachment, briefly
• Abbr. in an email field
• Secretly e-mail

Wikipedia Word definitions in Wikipedia
BCC may refer to: