Categories

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

• Robust statistics‏‎ (3 members)
• Rocket propulsion‏‎ (2 members)
• Rocketry‏‎ (1 member)
• Rolling stock‏‎ (1 member)
• Root-finding algorithms‏‎ (4 members)
• Rotation‏‎ (5 members)
• Rotation in three dimensions‏‎ (4 members)
• Rotational symmetry‏‎ (6 members)
• Routes of administration‏‎ (1 member)
• Rubber properties‏‎ (2 members)
• Rubik's Cube‏‎ (2 members)
• Rules‏‎ (1 member)
• Rules of inference‏‎ (8 members)
• Runge–Kutta methods‏‎ (1 member)
• Russian stock market indices‏‎ (1 member)
• S&P Dow Jones Indices‏‎ (1 member)
• SI base quantities‏‎ (2 members)
• SI base units‏‎ (1 member)
• SI derived units‏‎ (7 members)
• Safety‏‎ (1 member)
• Safety engineering‏‎ (2 members)
• Sailing‏‎ (1 member)
• Sampling (statistics)‏‎ (1 member)
• Sampling techniques‏‎ (2 members)
• Scale-invariant systems‏‎ (1 member)
• Scale statistics‏‎ (3 members)
• Scales‏‎ (2 members)
• Scaling symmetries‏‎ (2 members)
• Scanning probe microscopy‏‎ (2 members)
• Scattering‏‎ (7 members)
• Scattering, absorption and radiative transfer (optics)‏‎ (5 members)
• Scattering theory‏‎ (2 members)
• Scheme theory‏‎ (3 members)
• Schrödinger equation‏‎ (3 members)
• Science and technology during World War II‏‎ (1 member)
• Science and technology in Poland‏‎ (1 member)
• Science of photography‏‎ (4 members)
• Scientific laws‏‎ (4 members)
• Scientific modeling‏‎ (1 member)
• Scientific observation‏‎ (1 member)
• Scientific simulation software‏‎ (2 members)
• Scientific techniques‏‎ (9 members)
• Scorpius (constellation)‏‎ (1 member)
• Scottish inventions‏‎ (1 member)
• Search algorithms‏‎ (2 members)
• Sedimentology‏‎ (2 members)
• Seismology‏‎ (1 member)
• Seismology measurement‏‎ (1 member)
• Self-organization‏‎ (1 member)
• Self-reference‏‎ (1 member)