.accountant - Certified Public Accountants, tax advisors, corporate accountants, personal and business accountants, professional
                     CPA organizations

.accountants - accountants and accounting firms

.actor - Aspiring actors & their agents, theaters & movie studios, entertainment outlets & streaming video sites, movie review sites,
           celebrity gossip sites

.ads - advertising

.adult - adult entertainment (pornography)

.aero - air-transport industry

.africa - African and pan-African topics, African Union

.agency - Marketing and advertising agencies, PR or communications agencies, design firms, talent agencies, travel agencies,

               other related agencies

.airforce - Military recruiters, flight training schools, supply companies, military aircraft suppliers & repair companies, Air Force
               members and veterans

.apartments - Property (apartment) managers, condominium/apartment developers, college websites/centers, city guides &
                      community centers

.app - Apps

.apple - Apple

.archi - architects and architect firms

.army - Military recruiter, army supply stores, military training schools, army members and veterans

.art - artists, museums, art galleries, dealers, service providers and contractors

.associates - Accountants, law firms, consulting firms, real estate agencies, health & medical groups

.attorney - Independent attorneys and law firms of any size, legal services entities, elected officials and judges, professional
                organizations, law students

.auction - Auction houses & online auctions, car and truck auction, B2B commodity auctions, charity auctions for non-profits
               and schools, buyer and seller communities

.audio - stereo/sound systems, music

.auto - vehicles

.autos - vehicles