SHOP.COM lets Web browsers do it till they drop. The company pulls together products from more than 2,000 merchants (including Barnes & Noble, Best Buy, Gap, and Macy's), making them available to consumers in a single, convenient online location. It operates e-commerce sites in Canada, the UK, and the US. SHOP.COM's  precursor firm Altura International, a builder, developer, and manager of e-commerce sites for catalog and mail order retailers, was founded by Lee Lorenzen in 1997. Investors in SHOP.COM have included Bill Gates, Amazon.com, and venture capital firm Oak Investment Partners. Internet marketing firm Market America acquired SHOP.COM in late 2010.