Product Classification Systems

A tutorial at the Trade Port website in referencing the utility of classifying products, cites four different classification systems. From the linked article:

"Harmonized System (HS) and the Schedule B
Standard International Trade Classification (SITC) system
Standard Industrial Classification (SIC) system, which is being replaced by
North American Industry Classification System (NAICS)"

Knowledge of the classification systems and codes that pertain to particular products helps exporters compete in international markets.