We give a brief overview of the existing nuclear data base, and describe the structure
of the International Nuclear Data Centres Network. Because the amount of experimental data in
nuclear physics is extremely large, the note aims to show the way to modern methods of acquaintance with the characteristics of arrays of nuclei through the nuclear data banks accessible through
the Web-technologies. In particular, the note describes the methods to extract information on the
nuclei and nuclear reactions in nuclear data banks. The data include information on the masses
and energies of the nuclei of the separation energy of nucleons and clusters, the spectra of states
of nuclei, their spin, parity, isospin, charge and mass radii and densities, information about
the shape of the nuclei, the cross sections of nuclear reactions, the decay of unstable nuclei.
On the completeness and accuracy of the data depends on radiation and nuclear safety, and environmental acceptability of nuclear installations. Creating a nuclear databases in Belarus will
monitor the quality of nuclear data supplied to consumers, and ensure that systems of constants,
used in technical projects, the current international standards.

The article deals with the theoretical foundations of marginal costing. The possibilities
of this costing technique, which the enterprise receives in the field of economic and financial analysis,
are determined. A set of indicators (contribution margin, break-even point, contribution margin ratio,
margin of safety) is presented, which can be calculated by an enterprise if margin costing is used.
The calculation of these indicators based on the data of OJSC “GZLiN” was carried out.