The program of experimental data processing. Analogue PeakFit. This software is for operating of the amplitude spectra of signals of ionizing radiation and it provides operations with amplitude spectra in modern nuclear spectrometry: - spectrum smoothing - spectrum or its area integration - spectrum interpolation - spectrum area allocation for its further operating - spectrum or its area viewing in semilogarithmic scale on axis X or Y - spectrum area operating with approximation of Gauss function with hand correction of the main peak options: amplitudes, centre of gravity, FWHM, applications of background stand - printing of operated and non-operated spectrum area with deduction of the main peak options numerically