- real logarithmic valuation
- real machine
- real manifold
- real matrix
- real measure
- real monoidal transformation
- real norm
- real normed algebra
- real number
- real number field
- real number line
- real number picking
- real number system
- real number theory
- real octonion
- real orthogonal group
- real pair
- real parameter
- real part
- real plane
- real polarization
- real polynomial
- real prime divisor
- real process
- real projective plane