O2 O2 or O-2 may be : Oxygen ( O 2 , in its molecular form ) O2 plc , a telecommunications company . O-2 Skymaster O2 , an album released by boy band O-Town in 2002 O2 , a 2000 album by hard rockers FireHouse The O2 line of extreme sports games by Activision , a video game publisher The 02 Raffles Institute Scout Group - see The Singapore Scout Association O2 star , a subclass of O- class stars Magnavox Odyssey² , a games console Oceanic Airlines ( Guinea ) IATA airline designator O2Jam , a Korean electronic rhythm game SGI O2 , a workstation computer The O 2 , a large dome-shaped building in London `` O2 '' , a song by Sleater-Kinney from their 2002 album One Beat This page disambiguates a two-character combination . If an article link referred you to this page , you may wish to change the link to point directly to the intended article . Categories : Lists of two-character combinations In other languages : Deutsch | Italiano | 日本語 | Polski 