TNT(Thomas Nationwide Transport) as is delivery company that is provide the package either world wide or within a country by couriers.
I am not sure but I think the full form of TNT is Thomas Nationwide Transport couriers service.
Full form of TNT is Thomas Nationwide Transport and this started by Ken Thomas in 1946 and flourished his business in 1950. Now it's a global company
TNT does not have a full form anymore. It used to stand for Thomas Nationwide Transport, Ken Thomas having founded the company in Australia in 1946. It is a long time since it was a national or Australian company and is now owned by the Dutch post office