# Integration

Integration may refer to:

## Mathematics

• Integration, in mathematics, a fundamental concept of calculus—the operation of calculating the area between the curve of a function on the x-axis or y-axis
• Indefinite integration, in calculus, the process of calculating antiderivatives—the opposites of derivatives (a.k.a. "antidifferentiation")
• Symbolic integration, the computation, mostly on computers, of antiderivatives and integrals in term of formulas
• In numerical analysis and in signal processing, a time series can be "integrated" numerically by various step-by-step means, including autoregressive integrated moving average and the Runge-Kutta methods

## Electronics engineering

• Integrated circuit, an electronic circuit whose components are manufactured in one flat piece of semiconductor material
• System integration, the engineering practices and procedures for assembling large and complicated systems from less-complicated units, especially subsystems

## Genetics/Enzymology

• Pre-integration complex or retroviral integration, in biology
• DNA integration performed by a specific class of recombinase enzymes ("integrases"). Recognition of a target sequence triggers site-specific integration of ("crossover" with) a compatible "donor sequence"