Regla de la mano derecha
Science wp
Regla de la mano izquierda
Comunidad autónoma
Resonance
Reynolds number
ASCII
Bookmark (digital)
Continent
Right-hand rule
Rotation
Rotation around a fixed axis
Schrödinger equation
Schrödinger's cat
SI base unit
Origen del hombre
Backup
GNU General Public License
Solar time
Spacetime topology
Special relativity
List of continents by population
Speed of sound
Standard Model
Huella digital
List of largest cities
Standing wave
Streamlines, streaklines, and pathlines
List of mountains by elevation
String theory
BIOS