| C06EAF | Single one-dimensional real discrete Fourier transform, no extra workspace |
| C06FAF | Single one-dimensional real discrete Fourier transform, extra workspace for greater speed |
| C06FPF | Multiple one-dimensional real discrete Fourier transforms |
| C06PAF | Single one-dimensional real and Hermitian complex discrete Fourier transform, using complex data format for Hermitian sequences |
| C06PPF | Multiple one-dimensional real and Hermitian complex discrete Fourier transforms, using complex data format for Hermitian sequences |
| C06PQF | Multiple one-dimensional real and Hermitian complex discrete Fourier transforms, using complex data format for Hermitian sequences |