.safe - security and safety

.sale - Online and brick-and-mortar retailers and wholesalers, automotive and motorcycle
            dealers, discount, flash sale, and deal websites, auction sites and individuals
            selling items they no longer need

.salon - Hair salons, nail salons, beauty product companies, beauty schools

.scholarships - scholarship related

.school - Public schools, private & charter schools, specialty and trade schools,
               online learning sites, resource sites for teachers

.science - science-related sites

.search - search engines

.secure - security

.services - Service division of any company, home services (cleaning, landscaping,
                  plumbing, pet care), business services (tech support, interior design,
                  translation services), community service organizations

.sex - adult entertainment (pornography)

.sexy - adult entertainment

.shoes - Shoe stores, department stores, online retailers, athletic shoe retailers,
              discount shoe stores

.shopping - Online retailers, shopping centers, personal shoppers, discount sites & coupon
                    sites, shopping blogs & product reviews

.show - Ticket sale/resale sites, performance halls, music clubs/bars, streaming video
              services, movie review sites, travel sites & city guides

.singles - (Tickets) Ticket sale/resale sites, gaming agencies, movie review sites, city
                guides, sports sites (Dating) Dating & matchmaker sites, singles meetup groups,
                traditional “classified” sites, travel sites & city guides

.site - general

.ski - skiing

.soccer - Professional & amateur soccer clubs, soccer equipment suppliers &
               manufacturers, soccer & sports media networks, soccer players, enthusiasts,
               & spectators, soccer camps, coaches, & training organizations

.social - Advertising/Marketing/PR/Design agencies, media buying/production companies
              (digital & traditional), blogs & forums, event & meetup groups, any person or
              organization driving awareness of their social presence

.software - Software testing, support, & consulting companies, software product developers &
            manufacturers, software training & educational institutions, software resellers

.solar - Renewable & sustainable energy producers, solar panel, roof tile, & storage producers
        solar cell battery, chargers, lights, speakers, & generator manufacturers, sunglass,
        shades, UV clothing, sunblock & other solar protection products

.solutions - SaaS providers, people who offer do-it-yourself tips and tutorials,
            consultants, any business focused on providing the right solutions to
            their customers’ problems.

.space - as a creative space

.spreadbetting - Spread betting

.sport - sport institutions

.storage - Self storage

.store - stores

.stream - streaming media

.studio - Advertising/Marketing/PR/Design agencies, creative freelancers, other creative
              agencies (i.e., animation, production), dance, yoga, or fitness studios

.study - education

.style - Fashion bloggers, department stores, designers, online retailers

.sucks - gripe sites

.supplies - Contractors, distribution companies, appliance wholesalers & service,
                   auto/boat/heavy equipment businesses, home services retailers

.supply - Contractors, distribution companies, appliance wholesalers & service, auto/boat/heavy
               equipment businesses

.support - IT/Tech support services, social services, customer service & support departments,
                 independent consultants & consulting firms, staffing services

.surf - surfing

.surgery - Surgeons, primary/secondary care physicians, hospitals & clinics, healthcare
                 providers, insurance providers

.systems - IT businesses, other tech-focused businesses, businesses that sell electronics
                  or home security systems, organizational consultants