The NPD Group has signed an agreement with SportsOneSource (SOS) to acquire assets relating to the company's SSI Data POS Sports and Outdoor tracking business. The transaction is expected to close on April 1. SOS will no longer be in the sports retail data tracking business, but will continue to provide insight into and analysis of the market through its SGB Media publishing business. SGB Media properties include SGB Today, SGB Update, SGB Executive and