It is a numeric multi purpose system, the international convention on the HS was established under auspices of the World Customs Organisation in 1983, for the classification of goods with its six digits covering about 5000 descriptions of the products or groups of products most commonly produced and traded. It is designed for customs services, but can also be used for statistics, transport purposes, export, import and manufacturing.

Merchant inspired Carrier Haulage or customer nominated Carrier Haulage or shipper preferred Carrier Haulage service performed by a sub-contractor of the merchant

Note: In the United States the term 'Point to Point Transport' is used instead of the term 'Door to Door Transport', because the term 'house' may mean 'customs house' or 'brokers house', which are usually located in the port.

The central transhipment point in a transport structure, serving a number of consignees and/or consignors by means of spokes. The stretches between hubs mutually are referred to as trunks.