- CORDIC. Fast trigonometric function computation technique.
- Rainflow-counting algorithm. Reduces a complex stress history to a count of elementary stress-reversals for use in fatigue analysis.
- Osem. Algorithm for processing of medical images.
- Goertzel algorithm. Can be used for DTMF digit decoding.
- Discrete Fourier transform. Determines the frequencies contained in a (segment of a) signal.
- Fast Fourier transform
- Cooley-Tukey FFT
- Rader's FFT
- Bluestein's FFT
- Bruun's FFT
- Prime-factor FFT
- Richardson-Lucy deconvolution. Image de-blurring algorithm.
- Elser Difference-Map. X-Ray diffraction microscopy.