I have one personal Twitter account.

@JohnDCook | Personal |

I also have 15 tip accounts. These accounts post once per day, Monday through Friday, and have occasional unscheduled posts.

@ProbFact | Probability | |

@CompSciFact | Computer science | |

@AnalysisFact | Real and complex analysis, misc. applied math | |

@AlgebraFact | Algebra, number theory, and misc. pure math | |

@UnitFact | Units of measure and related topics | |

@NetworkFact | Networks and graphs | |

@UnixToolTip | Unix command line utilities | |

@MedVocab | Medical vocabulary | |

@SciPyTip | SciPy, scientific computing in Python | |

@RegexTip | Regular expression tips | |

@TeXtip | TeX and LaTeX tips, typography | |

@TopologyFact | Topology and geometry | |

@ScienceTip | Miscellaneous science | |

@diff_eq | Differential equations | |

@StatFact | Statistics, Bayesian and frequentist |