N/A= not applicable (It is used to indicate when information in a certain table cell is not provided, either because it does not apply to a particular case in question or because the answer is not available.)
E.g. “How old is your son?: N/A” (because the person is still single).
COB =Close of business (Used to refer to the end of a working day, usually when stating a deadline)
E.g. “This is just a reminder that the survey is still open and will remain open until COB today”
COD = cash on delivery (It is a mode of payment; you pay when the goods are delivered.)
E.g. “We don’t have to pay the printer now. It’s COD.”
TBD = to be decided (You will know it eventually.)
E.g. “No. of participants: TBD”
RSVP= Répondez s’il vous plait (RSVP is indeed French and it stands for répondez s’il vous plaît. It literally means “please respond”. RSVP is now a fixed idiom, even in French.)
E.g. “RSVP to John by April the 20th”
Other Business Abbreviations You Should Know
Some abbreviations can be used in emails or chatting online, some are specific to the virtual workplace.