Field, as of study, can refer to a wide range of topics and disciplines. It is often used to describe a specific AREA of knowledge or expertise. For example, a person may specialize in a particular field of study such as mathematics, biology, or history. Field, as of study, can also refer to a particular branch of science or technology, such as computer science or engineering. Additionally, it can be used to describe a particular AREA of research or investigation, such as psychology or sociology.