Companies catalogue
- O'Brien Real Estate Keysborough, Keysborough
- O'Ryan Michael, Frankston
- O'Sole Mio Pizza, Doreen
- OCR - O'Connor Commercial Refrigeration, Mitchell
- ONA Coffee House Cafe, Fyshwick
- ONTHEGO Custom Apparel - Teamwear Specialists, Canberra
- OPC IT, Fyshwick
- OPEA, Melbourne
- OPSM Box Hill, Box Hill
- OPSM Forest Chase, Forest Hill
- OPSM Karingal, Karingal
- OPSM Ringwood, Ringwood
- OSC & R on Rathdowne, Carlton
- OYG Espresso Bar, Melbourne
- OZ Breathalyzer - The Breathalysers Experts, Bayswater
- OZ Satellite Rentals, Malvern East
- OZBinoculars.com.au, Bayswater
- OZPictureFrame.com.au, Bayswater
- OZiTechs, Coombs
- Oak Park Primary School, Oak Park
- Oakleigh & District Health Centre GP, Hughesdale
- Oakleigh Eye Centre, Hughesdale
- Oakleigh Family Medical Centre, Oakleigh
- Oakleigh Medical Centre - Dr. Joseph Feiber, Oakleigh
- Oakleigh Primary School and Kindergarten, Oakleigh
- Oakleigh South Primary School, Oakleigh South
- Ocean Catch Fish & Chips, Mornington
- Ocean Computing Solutions, Deakin
- Octane Espresso, Melbourne
- Octango Pty Ltd, Canberra
- Odeya, Melbourne
- Odos Drive School, Rowville
- Off Lead Dog Park, Point Cook
- OfficePCs Pty, Bywong
- OfficeTeam, Melbourne
- Officer Family Health, Officer
- Officeworks Belconnen, Belconnen
- Offor Jane, Mount Martha
- Ohel Chana College of Advanced Jewish Education for Women, Saint Kilda East
- Ojay PTY Ltd., Richmond
- Okami Japanese Restaurant - Chirnside Park, Chirnside Park
- Okie Dokie, Braeside
- Olenski Michael Dr, Albert Park
- Olga Berg Head Office, Elsternwick
- Olinda Yarra, Yering
- Oliver Brown, Griffith
- Olympia Automotive Services, Airport West
- Olympic Park Sports Medicine Centre - Dr. Peter Brukner, Melbourne
- Olympic Village Maker's Market, Heidelberg West
- Omega Engine Development Co PTY LTD, Heidelberg Heights
- Omnipath, Hampton East
- Omnitron Technologies Pty. Ltd., Balwyn North
- On Site Access & Scaffolds, Dandenong South
- On The Ball Personnel, Melbourne
- On Topic E-Commerce, Chirnside Park
- One Off Engraved Signs, Keilor
- One Point Medical, Prahran
- One Space Two, Saint Kilda
- One Square Espresso Bar, Elsternwick
- Online Learning Centre, South Melbourne
- Online Offline, Fitzroy North
- Online Stationery Supplies, Hurstbridge
- Online Works PTY Ltd., Melbourne
- Only Just Fair Trade Inc, Eltham
- Only Water, Saint Kilda
- Onsite First Aid Training, Templestowe
- Oorama Education, Cranbourne
- Opal E Commerce, Box Hill
- Open Range Quarterhorse Stud & Training Centre, Mount Martha
- Opt Energy, Docklands
- Opthea, South Yarra
- Optical City, Balaclava
- Optical In Sight, Doncaster East
- Optical Services, Melbourne
- Origin Driving School Brighton, Brighton East
- Origin Driving School Noble Park, Noble Park
- Orion Medical Centre, Upper Ferntree Gully
- Ormond Medical Centre - Dr. Severyn Praszkier, Ormond
- Orrong Romanis Reserve, Prahran
- Ortner Building Contractors, Ainslie
- Our Lady of Rivergum Medical Centre - Alexander Hala, Mill Park
- Our Lady of Rivergum Medical Centre - Alexander Mourad, Mill Park
- OutBeyond Australia, Moorabbin
- Outlook Drive Medical Centre, Dandenong North
- Overland Reserve, Keilor East
- Overport Park, Frankston South
- Overport Primary School, Frankston
- Ovulation Calculator Pty Ltd, Hampton East
- OxoPak Pty Ltd, Dandenong
- Oz Farm, Carrum Downs
- Oz Pizza Delight Croydon, Croydon North
- Oz Pizza Delight Hoppers Crossing, Hoppers Crossing
- Oz Pizza Delight Langwarrin, Langwarrin
- OzLabs, Forrest
- Ozpropertylaw Pty Ltd, Canberra
- Ozzie Jobs, South Melbourne
- Ozzy Dog Care, Point Cook
- omniIT, Mitchell
- oopsiebubsie, Cranbourne West
- ozitsupport, Pearce