Engineering is the practical application of science and mathematics, as in the design and construction of machines, vehicles, structures, roads, and systems.
Businesses may also be not-for-profit or state-owned. A business owned by multiple individuals may be referred to as a company.
The focus of public health intervention is to improve health and quality of life through prevention and treatment of disease and other physical and mental health conditions.
The field of computing includes computer engineering, software engineering, computer science, information systems, and information technology.