# Imperial 81M

The Imperial 81M is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 19 keys, and a VFD (vacuum fluorescent) display. The power source is 3xAAA.
**Note:** Royal 81M

## Facts at a glance:

Feature | Value |
---|---|

Type | Arithmetic |

Functions | 5 |

Keys | 19 |

Precision | 8 |

Logic | Algebraic |

Display type | VFD |

Length | 92mm |

Width | 63mm |

Thickness | 22mm |

Power Source | 3xAAA |

Year introduced | 1975 |

## Replacements:

If you have an Imperial 81M that is no longer working, you can first try replacing the 3xAAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.

We suggest the following current models as possible replacements: