# Enterprex R-90

The Enterprex R-90 is an arithmetic calculator with algebraic logic. It has 5 functions, and an LED (light-emitting diode) display typical of calculators of this era. The power source is 2xAA batteries.

## Facts at a glance:

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

Type | Arithmetic |

Functions | 5 |

Logic | Algebraic |

Display type | LED |

Length | 121mm |

Width | 76mm |

Power Source | 2xAA batteries |

Year introduced | 1975 |

## Replacements:

If you have an Enterprex R-90 that is no longer working, you can first try replacing the 2xAA 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: