The Census Bureau has a long history of providing data on thousands of manufactured products, and also has published data on hundreds of product lines in wholesale and retail trades, and types of services provided by other service companies.
In 2002, product lines in four service sectors (51, 52, 54 and 56) were classified consistent with a new international agreement with Canada and Mexico, as the first phase in implementing the new North American Product Classification System (NAPCS).
For 2007, all remaining product lines for "service" industries (sectors 51 to 81) will be based on NAPCS. These data will be published in Product Lines data sets. In most cases, more product categories will be shown in the affected industries, although there will be some loss of comparability to prior census product line data.