Mechanical engineering: Mechanical engineering is defined as the branch of engineering, which uses the principles for physics, uses material science principles for the analysis purpose, designing, manufacturing and for the maintaining the mechanical systems, it also handles the production by the usage of heat, mechanical power which is used for the design and the production purpose and for performing the operation of machine and tools. The mechanical engineering includes understanding of the core that is the kinematics, thermodynamics, material science, structural analysis and mechanics these added with the tools of computer aided engineering and product lifecycle management which is used for the design, analysis, manufacturing, heating and cooling systems.