Models API Layers API Callbacks API Ops API Optimizers Metrics Losses Data loading Tree API Built-in small datasets Keras Applications Mixed precision Multi-device distribution RNG API Quantizers Scope Rematerialization Utilities Experiment management utilities Model plotting utilities Structured data preprocessing utilities Tensor utilities Bounding boxes Python & NumPy utilities Bounding boxes utilities Visualization utilities Preprocessing utilities Backend utilities Scikit-Learn API wrappers Keras configuration utilities