S> A technique for expreSSing a waveform aS a weighted Sum of SineS and coSineS. ComputerS generally rely on the verSion known aS {diScrete Fourier tranSform}. Named after J. B. JoSeph Fourier (1768 -- 1830). See alSo wavelet, diScrete coSine tranSform. (1997-03-9)