The calculation concerns solutions of pressure vessels and their components. The calculation solves deformations and curves of stress in rotational shells loaded with axial force, pressure, radial force and a bending moment. This program is intended for homogeneous shells of identical thickness and a single material. The calculation also enables solutions for connecting two shells of different parameters (thickness, material, dimensions...).The program enables:- Calculation of cylindrical, conical and spherical thin-wall shells.- Calculation of a cylindrical and spherical thick-wall shells.- Calculation of a round plate.- Selection of various loading methods (joint, force, moment, rotational, load with fluid...).- Calculation of deformation, radial shift, moment and stress in any point.- Visualisation of charts with curves of the calculated values.The calculation uses the data, procedures, algorithms and information from the professional literature (Roark formulas, Machinery\'s Handbook 26th, Teorie desek a skorepin [doc. Ing. Ladislav Subrt, CSc.] and others)