Categories

The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.

• Oceanography‏‎ (1 member)
• One-of-a-kind computers‏‎ (1 member)
• Ontology‏‎ (1 member)
• Operator theory‏‎ (21 members)
• Ophthalmic equipment‏‎ (1 member)
• Ophthalmology‏‎ (1 member)
• Optical communications‏‎ (1 member)
• Optical components‏‎ (1 member)
• Optical devices‏‎ (1 member)
• Optical fiber‏‎ (1 member)
• Optical filters‏‎ (2 members)
• Optical metrology‏‎ (2 members)
• Optical mineralogy‏‎ (1 member)
• Optics‏‎ (21 members)
• Optimal control‏‎ (4 members)
• Optimal decisions‏‎ (3 members)
• Optimization algorithms and methods‏‎ (6 members)
• Optimization in vector spaces‏‎ (1 member)
• Options (finance)‏‎ (6 members)
• Optometry‏‎ (1 member)
• Orbits‏‎ (14 members)
• Order theory‏‎ (8 members)
• Ordinary differential equations‏‎ (20 members)
• Organic oxidation reactions‏‎ (1 member)
• Organic reactions‏‎ (1 member)
• Orientation (geometry)‏‎ (7 members)
• Orthogonal polynomials‏‎ (6 members)
• Oscillators‏‎ (1 member)
• Oxidizing agents‏‎ (1 member)
• P-adic numbers‏‎ (1 member)
• P-groups‏‎ (1 member)
• Packaging‏‎ (1 member)
• Pages that use a deprecated format of the chem tags‏‎ (2 members)
• Pages that use a deprecated format of the math tags‏‎ (26 members)
• Pages using deprecated source tags‏‎ (22 members)
• Pages with broken file links‏‎ (83 members)
• Pages with ignored display titles‏‎ (4 members)
• Pages with math errors‏‎ (4 members)
• Pages with math render errors‏‎ (4 members)
• Pages with reference errors‏‎ (171 members)
• Pages with syntax highlighting errors‏‎ (1 member)
• Pairing-based cryptography‏‎ (1 member)
• Paleoclimatology‏‎ (1 member)
• Palladium‏‎ (1 member)
• Paper folding‏‎ (1 member)
• Papyrus‏‎ (1 member)
• Parabolas‏‎ (3 members)
• Parabolic partial differential equations‏‎ (4 members)
• Paradoxes‏‎ (2 members)
• Paradoxes of naive set theory‏‎ (1 member)