base | The R Base Package |

compiler | The R Compiler Package |

datasets | The R Datasets Package |

graphics | The R Graphics Package |

grDevices | The R Graphics Devices and Support for Colours and Fonts |

grid | The Grid Graphics Package |

methods | Formal Methods and Classes |

parallel | Support for Parallel computation in R |

splines | Regression Spline Functions and Classes |

stats | The R Stats Package |

stats4 | Statistical Functions using S4 Classes |

tcltk | Tcl/Tk Interface |

tools | Tools for Package Development |

utils | The R Utils Package |