| ott.business.ads | y | Only group allowing commercial advertising in Ottawa |
| ott.business.ads.computing | y | |
| ott.community.motss | y | Gay, lesbian, bi, trans chat in Ottawa-Hull, Canada |
| ott.config | y | ott.* hierarchy administrivia discussions |
| ott.education.homeschooling | y | |
| ott.education.misc | y | |
| ott.events | y | Seminars and the like at Ottawa sites |
| ott.forsale.computing | y | Computers & related equipment forsale/wanted in Ottawa |
| ott.forsale.other | y | Otherwise unclassified items forsale/wanted in Ottawa |
| ott.forsale.vehicles | y | Vehicles forsale/wanted in Canada's National Capital Region |
| ott.general | y | General news local to Ottawa sites |
| ott.housing | y | Places to live wanted, for sale or for rent |
| ott.jobs | y | |
| ott.motorcycles | y | |
| ott.online | y | |
| ott.personals | y | Personals in Ottawa, Canada -- no commercial ads |
| ott.politics | y | |
| ott.rec.books | y | |
| ott.rec.canoe-kayak | y | |
| ott.rec.sailing | y | Sailing in Ottawa, Ontario, Canada |
| ott.rec.snowmobiling | y | |
| ott.rides | y | Rides wanted/offered to or from Ottawa |
| ott.singles | y | |
| ott.talk.high-tech | y | |
| ott.test | y | |
| ott.vietnamese | y | Vietnamese interest group |
| ott.weather | m | Weather forecasts for the Ottawa area |