• Octopus Band
  • Odd
  • Odd Børre
  • Ofsdal, Steinar
  • Old Man's Child
  • Ole Ivars
  • Olsen, Ragnar
  • One 2 Many
  • Opaque
  • Opsahl, Arve
  • Oral Bee
  • Oral Constitution
  • Oriental Sunshine
  • Original Oslo Jazzband
  • Oslo Børs
  • Oslo Fluid
  • Oslo Gospel Choir
  • Ottersen, Frank
  • Ottersen, Vidar