[en] In gamma-ray spectrometry measurements, an energy distribution of gamma-rays is viewed by a spectrometer which in turn produces a data set. This data is the result of a complex detection process and generally suffers from loss of resolution due to this detection process and to statistical noise. It is the purpose of the MAZNAI computer program to remove the degrading effects of the detector, to minimize the effects of statistical fluctuations, and to construct an enhanced image spectrum that corresponds as closely as possible to the spectrum of radiation incident on the detector. Section 2 of this report gives a brief description of the MAZNAI methodology, Section 3 discusses detector response functions. Section 4 is the user's guide which describes particular details of the preparation of the data necessary for running the code. Appendix A contains the code listing. The Berger and Seltzer Publication, which is the basis for the adopted detector response function parameterization, is included as Appendix B