| HFT | Hypercomplex Fourier Transformation |
| DFT | Discrete Fourier Transformation |
| PFT | Pulse Fourier Transformation |
| IFT | Inverse Fourier Transformation |
| DFFT | Double Forward Fourier Transformation |
| IFFT | Inverse Fast Fourier Transformation |
| FFT | Fast Fourier Transform/Transformation |
| Trsf. | Transformation |
| Transf. | Transformation |
| ILT | Inverse Laplace Transformation |
| RFT | Rotational Frame Transformation |
| UTF | Unicode Transformation Format [UTF-8, UTF-16, UTF-32] |
| DWT | Discrete Wavelet Transformation |
| CCT | Continuous Cooling Transformation |
| KKT | Kramers-Kronig Transformation |
| VFT | Vibrational Frame Transformation |
| FT | Fourier Transform |
| FF | Fourier Frequencies |
| FSD | Fourier Self-Deconvolution |
| FS | Fourier Series |
| FC | Fourier Components |
| UTF | Universal character set Transformation Format |
| XSLT | Extensible Stylesheet Language Transformation |
| IDCT | Inverse Discrete Cosine Transformation |
| BWT | Burrows Wheeler Transformation [engl.] |
| CTM | Current Transformation Matrix [PostScript] |
| DCT | Discrete Cosine Transform/Transformation |
| DCT | Discrete/Direct Cosinus Transformation |
| FTP | Fourier Transform Polarography |
| FFT | Fast Fourier Transform |
| MWFT | Microwave Fourier Transform |
| FSW | Fourier Series Window |
| IFS | Infrared Fourier Spectrometry |
| ADCT | Adaptive Discrete Cosine Transformation [engl.] |
| IRFT | Inversion-Recovery Fourier Transform |
| FT-RS | Fourier Transform-Raman Spectroscopy |
| idft | Inverse Discrete Fourier Transform |
| DFTS | Dispersive Fourier Transform Spectrometry |
| FT-MW | Fourier Transform Microwave Spectroscopy |
| FFTS | Fast Fourier Transform Spectrometry |
| FT-MS | Fourier Transform Mass Spectrometry |
| FT-IR | Fourier Transform Infrared Spectroscopy |
| FTS | Fourier Transform Spectroscopy/-metry |
| WIFT | stored Waveform Inverse Fourier Transform |