41 Education, namely, conducting seminars, workshops, classes and on-line classes in the fields of mathematics, statistics, physics, chemistry, biology, foreign languages, human resources, law and legislation, electricity, industrial processes and materials, mechanics, hydraulics, pneumatics, electronics, cooling and refrigeration systems, aircraft maintenance, aerodynamics, aircraft engineering, industrial maintenance, welding, metallurgy, energy and energy savings, environment, machine-tools, industrial networks, micro-technologies, product development, computers, software development, multimedia and computer graphics, business management, quality management and security management; training in the field of industrial processes, mechanics, hydraulics, pneumatics, electronics, cooling and refrigeration systems, aircraft maintenance, aerodynamics, aircraft engineering, industrial maintenance, welding, machine-tools, industrial networks, micro-technologies, computers, software development, multimedia and computer graphics, business management, quality management and security management