nordlead on 13 November 2008
to further expand on reask's response.
The NPD is really called the NPD Group Inc, and was once known as National Purchase Diary.
NPD is a Market Research company consisting of a thousand employees who estimate sales of all sorts of products sold in the United States and Canada. They cover products such as electronics, automobiles, sports, food services, beauty products entertainment, and other such products. Not only do they estimate sales, they provide analysis of the sales and consumer habits to paying customers.
For the purposes of video game sales, they provide a monthly total of US hardware and software sales.
@reask
NPD will report on USA hardware and software totals for the four weeks ending November 1 on November 13 at 6:30 PM EST
