Oct

• 8
• Microsoft Office 2007
• NASA Institute for Advanced Concepts
• OTC (disambiguation)
• Octal
• Octans
• Octave (electronics)
• October
• Odd cycle transversal
• Olefin conversion technology
• Ontario Certified Teacher
• Optical coherence tomography
• Optimal cutting temperature compound
• Orangi Charitable Trust
• Organic cation transport protein
• Orion correlation theory
• Overseas Chinese Town
• Overseas Chinese Town Limited
• Overseas countries and territories
• Oxford Classical Texts
• Oxytocin challenge test
• cancer research
• clinical trial
• microfinance
• obsessive-compulsive disorder