Old joke that I heard told by a Canadian (Canada's original name was CND) when I was working in Ottawa. No offense intended. Maybe it was too old of a joke.
No offence taken. I just didn't get what you were referring to, or what the point (or in this case joke) was.
I think your memory reference to CND may be a bit blurred by the ravages of time! It's OK, it's a common problem that I am susceptible to as well!!
There are a number of short-term references to things related to Canada. The most common today are "CAD" (the official ISO international designation for the Canadian dollar), comparable to "USD" (for the US dollar). The other most common is "CAN" (usually used as a short-term reference to Canada in places like international sports competitions), comparable to USA instead of United States of America. Then of course there is also the ".ca" instead of ".com" for websites and email addresses.
I have never seen "CND". I suspect you may have been thinking of the designation"CDN", which is the older three-letter symbol for "Canada" or "Canadian" when travelling internationally.
It was originally assigned under the Geneva and Vienna Road Conventions as the designation for Canada. It has mostly been supplanted today by the "CAN" form, but it still technically applies when driving a car with Canadian licence plates in other countries outside North America. Unlike European plates, North American plates are issued by each province or state. When driving your vehicle outside the country of origin you should (and in some countries must) have a national identifier sticker near the rear plate, unless it is part of the plate. Most modern European plates have the one-, two- or three-letter country identifier imprinted right on the plate itself. Outside of North America a Canadian vehicle should display a CDN sticker near the rear plate, a US vehicle should display a USA sticker and a Mexican vehicle should display a MEX sticker.
en.wikipedia.org
Aren't you glad you asked??
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