Definition: Calculus (Latin calculus, from the Greek κλάσις, kalsaion, "to measure") is a branch of mathematics that uses limits to study curves, functions, and other objects. It has many different subfields with their own specialized methods. The precise definition of what it means by "calculus" can vary. Some define calculus as the study of limits and their applications in various mathematical fields such as science (measuring length, area, volume), engineering (measuring force, work, velocity), and economics (measuring interest rates and inflation). Others may focus on the study of continuous changes rather than discrete ones, focusing more on "infinitesimals." The concept of "calculus" is foundational to modern mathematics. It provides a way to reason about objects that are very large or very small, like infinite series or infinitesimal quantities. It also underlies much of modern physics and engineering. To be clear, the word "Calculus" does not have an exact definition, but it often refers to a field of study where mathematical functions are analyzed through limits, derivatives, integrals, and other techniques that allow one to determine these relationships between variables.

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