Companies catalogue
- OHM Chartered Accountants, Malvern
- OLSH College Bentleigh, Bentleigh
- OMIC, North Melbourne
- OSHC SQUAD, Koo Wee Rup
- OZ Design Furniture, Fyshwick
- Oakleigh General Cemetery, Hughesdale
- Oakleigh-Carnegie RSL Club, Oakleigh
- Occasional Care, Croydon
- Ocean Blue Hairdressing, Canberra
- Officer Childcare Centre, Officer
- Officeworks Braddon, Braddon
- Officeworks Fyshwick, Fyshwick
- Oh-Two-One Barber Shop, Griffith
- Oilchem PTY Ltd., Epping
- Okey Dokey, Bayswater
- Old Geelong Football Club, South Yarra
- Oliver Brown, Canberra
- One Mission Society Australia Inc., Ringwood East
- One Voice, West Footscray
- Only About Children Armadale, Armadale
- Only About Children Armadale, Armadale
- Only About Children Brighton East, Brighton East
- Only About Children Camberwell, Camberwell
- Only About Children Cheltenham, Cheltenham
- Only About Children Highett, Highett
- Onya Bike, Canberra
- Onya Bike, Belconnen
- Open House Christian Involvement Centres, Macleod
- Operation Cleft, Blackburn Vic
- Oporto South Melbourne, South Melbourne
- Optimal Chiropractic Clinic, Hawthorn
- Oriental Healthyway Chinese Medicine, Box Hill
- Original Mattress Factory, Fyshwick
- Ormond Funeral Services, Fawkner
- Ostara Australia, Cheltenham
- Ostindo International PTY Ltd., Hallam
- Our Holy Redeemer School, Surrey Hills
- Our Lady Guardian of Plants Chaldean Catholic Church, Campbellfield
- Our Lady Help of Christians - Eltham, Eltham
- Our Lady Help of Christians Parish, Narre Warren
- Our Lady Help of Christians Primary School, Eltham
- Our Lady Of Mt Carmel Church, Middle Park
- Our Lady of Good Counsel Primary School, Deepdene
- Our Lady of Lebanon Church, Thornbury
- Our Lady of Lourdes, Prahran
- Our Lady of Lourdes Catholic Primary School, Prahran
- Our Lady of Lourdes Parish, Bayswater, Bayswater
- Our Lady of Lourdes Primary School, Bayswater
- Our Lady of Perpetual Help School, Ringwood
- Our Lady of Sion College, Box Hill
- Our Lady of the Assumption Catholic Church, Cheltenham
- Our Lady of the Immaculate Conception, Sunshine
- Our Lady of the Immaculate Conception Primary School, Sunshine
- Our Lady of the Nativity, Aberfeldie
- Our Lady of the Pines Primary School, Donvale
- Our Lady of the Way, Kingsbury
- Out There Signs, Canberra
- Outcomes Assist, Melbourne
- Outside Concepts Kew, Kew East
- OzChild, Dandenong
- Ozchild, Frankston South
- Ozzie Chicks, Hampton