Aerospace engineering focuses on the design and function of aircraft and spacecraft. It consists of two major branches: aeronautical engineering, which focuses on the theory of atmospheric flight, and astronautical engineering, which focuses on space exploration and launch vehicles. To make advances in these fields, aerospace engineers develop technology, systems, and software to create these vehicles. They may particularly specialize in manufacturing satellites, missiles, and jet propulsion systems.
Mechanical engineering is a wide branch of engineering which combines physics, mathematics, and materials science to design, test, manufacture, and maintain mechanical systems. If something moves or uses energy, a mechanical engineer was involved in designing/building it. Mechanical engineering is composed of thermal design and machine design. Thermal design includes the subjects of heat transfer, fluid mechanics, and thermodynamics, while machine design includes the subjects of mechanical behavior, machine elements, and manufacturing processes. To become a mechanical engineer, you have to have knowledge in each of these six areas.
As a discipline influencing numerous areas of technology, Chemical Engineering is a branch of engineering dealing with chemical production and the fabrication of products using chemical process. Chemical engineers, in general terms, conceptualize and develop methods for producing, transforming, and transporting materials, beginning with laboratory research and progressing to full-scale production.
Industrial Engineers organize different tools and engineers to produce a service or product. Depending on the task at hand, industrial engineers work in different environments to improve or fix problems. This involves data analysis or collection. By optimizing each task, these engineers maximize efficiency and coordinate large projects.