Applied science is the application of scientific knowledge transferred into a physical environment. Examples include testing a theoretical model through the use of formal science, or solving a practical problem through the use of natural science.Fields of engineering are closely related to applied sciences. Applied science is important for technology development.

Engineering is the discipline, art and profession of acquiring and applying technical, scientific, and mathematical knowledge to design and implement materials, structures, machines, devices, systems, and processes that safely realize a desired objective or invention.