# MBO Delta 20

The MBO Delta 20 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 23 keys, and a VFD (vacuum fluorescent) display. The power source is AA batteries.

## Facts at a glance:

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

Type | Arithmetic |

Functions | 6 |

Keys | 23 |

Precision | 8 |

Logic | Algebraic |

Display type | VFD |

Power Source | AA |

Year introduced | 1975 |

## Replacements:

If you have a MBO Delta 20 that is no longer working, you can first try replacing the AA battery. 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: