.baby - For selling baby products

.band - Music venues, ticket sale/resale sites, music band & musician sites, school band sites, music review sites

.bank - banks

.bar - Bars and related industry

.bargains - Online retailers, large and small, “sale” sections on retail websites, discount & overstock sites, bargain
                   hunters, frugal-living bloggers

.baseball - baseball

.basketball - basketball

.beer - breweries and beer aficionados

.best - .bestbuy

.bet - gambling

.bid - auctions

.bike - Bicycle & motorcycle enthusiasts, bike retailers & gear shops, bike repair shops, biking event organizers,
           bike or motorcycle clubs

.bingo - Bingo halls, casinos, online & casual gaming sites, travel agencies

.bio - Organic agriculture

.biz - business

.black - those who like the color black

.blackfriday - Black Friday, retail

.blog - Blogs

.blue - those who like the color blue

.boston - websites related to the city of Boston, Massachusetts USA

.boutique - Specialty online retailers, vintage shops, designers, artists and artisans, craftspeople

.box - Individuals and businesses, in order to promote personal cloud storage

.broadway - Broadway theatre

.build - construction industry

.builders - Contractors, subcontractors, commercial/residential architects, interior designers

.business - Creative businesses & agencies, freelancers & independent consultants, any other business looking to
                   differentiate from the competition

.buy - sales

.buzz - marketing and social networking