Scikit is a platform for machine learning and scientific computing using Python. It combines the NumPy, SciPy, and matplotlib libraries to provide "simple and efficient tools for predictive data analysis." The page linked above provides a number of example applications, including classification, regression analysis, clustering, dimensionality reduction on multivariate data, model selection, and feature extraction for machine learning systems. Links to code demonstrating each application are provided alongside links to detailed reference manuals. The "User Guide" provides laboratory-style exercises that demonstrate the different kinds of analyses that the software can perform. The "Install" section provides instructions for Windows, macOS, and Linux systems, for use in both a system's Python distribution and inside the Anaconda Python environment.