**Fundamentals of Numbering System**

Humans use the base 10 (decimal) number system. Base 10 contains digits 0 through 9.

Computers use the base 2 (binary) number system. Base 2 contains digits 0 and 1. These two binary digits are commonly referred to as bits. Binary system is used in computers because 1 and 0 represent the two voltage levels of on and off.

The convenient representation of binary numbers is base 16 (hexadecimal) number system. Base 16 contains digits 0 through F.

Computers use the base 2 (binary) number system. Base 2 contains digits 0 and 1. These two binary digits are commonly referred to as bits. Binary system is used in computers because 1 and 0 represent the two voltage levels of on and off.

The convenient representation of binary numbers is base 16 (hexadecimal) number system. Base 16 contains digits 0 through F.

Decimal | Binary | Hexadecimal |
---|---|---|

0 | 0000 | 0 |

1 | 0001 | 1 |

2 | 0010 | 2 |

3 | 0011 | 3 |

4 | 0100 | 4 |

5 | 0101 | 5 |

6 | 0110 | 6 |

7 | 0111 | 7 |

8 | 1000 | 8 |

9 | 1001 | 9 |

10 | 1010 | A |

11 | 1011 | B |

12 | 1100 | C |

13 | 1101 | D |

14 | 1110 | E |

15 | 1111 | F |

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**Related topics:**

Microcomputer System | Microcomputer System Architecture | Memory Basics | Digital Logic | ASCII Code | Computer Internals | ROM and RAM Memory

**List of topics:**Microcomputer

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