Invitation reminder letters

• BBQ invite letters
• Part of an invitation to an imbiber
• "We're not serving liquor," briefly
• [Guests must provide their drinks]
• Setup provider's abbr
• Invite abbr
• Abbr. in many a party invitation
• "No alcohol provided" letters
• Abbr. on some invitations

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
initialism (acronym) for "bring your own bottle" or "bring your own booze," by 1951.