Science (from Latin scientia, meaning "knowledge") is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.
Modern science is typically divided into three major branches that consist of the natural sciences (e.g. biology, chemistry, physics), which study nature in the broadest sense; the social sciences (e.g. psychology, sociology, economics, history) which study people and societies; and the formal sciences (e.g. mathematics, logic, theoretical computer science), which study abstract concepts. There is disagreement, however, on the formal sciences being a science as they do not rely on empirical evidence. Disciplines that use science, such as engineering and medicine, are described as applied sciences.
- Bacteriology – study of bacteria
- Balneology – science of the therapeutic use of baths
- Barodynamics – science of the support and mechanics of bridges
- Barology – study of gravitational force
- Bathymetry – study of underwater depth of ocean floors or lake floors
- Batology – the study of brambles
- Bibliology – study of books
- Bibliotics – study of documents to determine authenticity
- Bioecology – study of interaction of life in the environment
- Biology – study of life
- Biochemistry – study of chemical processes within and relating to living organism
- Biomechanics – study of the structure, function and motion of the mechanical aspects of biological systems
- Biometrics – study of biological measurement for security purposes
- Bionomics – study of organisms interacting in their environments
- Biophysics – study of physics of biological phenomena
- Biopsychology – application of the science of biology to the study of psychology
- Biotribology – study of friction, wear and lubrication of biological systems
- Botany – study of plants
- Bromatology – study of food
- Bryology – study of mosses and liverworts
- Quinology – study of quinine.
- Quantum Mechanics – a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.
- Queer theory – study of issues related to sexual orientation and gender identity.
- Raciology – study of racial differences
- Radiobiology – study of the scientific principles, mechanisms, and effects of the interaction of ionizing radiation with living matter
- Radiochemistry – study of ordinary chemical reactions under radioactive circumstances
- Radiology – study of X-rays and their medical applications
- Reflexology – study of reflexes
- Rheology – science of the deformation or flow of matter
- Rheumatology – study of rheumatism
- Rhinology – study of the nose
- Rhochrematics – science of inventory management and the movement of products
- Robotics – deals with the designing, construction, and operation of robots.
- Runology – study of runes