Derivative: A derivative measures how much one quantity changes with respect to another quantity. It represents the rate of change or slope of a function at any given point.
Integral: An integral calculates the area under or between curves by summing up infinitely many infinitesimal rectangles or slices. It can be thought of as reverse differentiation.
Limit: A limit describes what happens as one variable approaches a certain value or as it goes towards infinity or negative infinity. Limits are fundamental for understanding continuity, derivatives, and integrals in calculus.