# Multilayer perceptron

## Type of feedforward neural network / From Wikipedia, the free encyclopedia

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"MLP" is not to be confused with "NLP", which refers to natural language processing.

A **multilayer perceptron** (**MLP**) is a name for a modern feedforward artificial neural network, consisting of fully connected neurons with a nonlinear kind of activation function, organized in at least three layers, notable for being able to distinguish data that is not linearly separable.^{[1]} It is a misnomer because the original perceptron used a Heaviside step function, instead of a nonlinear kind of activation function (used by modern networks).

Modern feedforward networks are trained using the backpropagation method^{[2]}^{[3]}^{[4]}^{[5]}^{[6]} and are colloquially referred to as the "vanilla" neural networks.^{[7]}