- biogeochemical cycles
- biological assay
- biological cybernetics
- biological information theory
- biomathematics, mathematical biology
- biometric analysis of infant mortality
- bionics
- biorthogonal system
- biorthonormal scaling sequences
- biorthonormal wavelet basis
- biorthonormal wavelets
- biorthonormal wavelet sequences
- biostatistics
- biotic potential
- Biot-Savart law
- Biot-Savart theorem
- bipartite graph
- bipartite map
- bipolar theorem
- biprefix code
- bi-productive set
- bipyramid
- biquadratic equation
- biquadratic equation
- biquotient mapping