**UNITS:** Byte = 1 Character, 8 bits (binary digits), ex.
10110100

KB = Kilobyte = 1024 or 2 to the 10th power. Kb = kilobit or 1,000 (Thousand) bits.

MB = Megabyte = 1,048,576 or 2 to the 20th power. Mb = Megabit or 1,000,000 (Million) bits

GB = Gigabyte = 1,073,741,824 or 2 to the 30th power. Gb = Gigabit or 1,000,000,000 (Billion) bits

TB = Terabyte = 1,099,511,627,776 or 2 to the 40th power. Tb = Terabit or 1,000,000,000,000 (Trillion) bits

PB = Petabyte = 1,125,899,906,842,624 or 2 to the 50th power. Pb = Petabit or 1,000,000,000,000,000 (Quadrillion) bits

EB = Exabyte = 1,152,921,504,606,846,976 or 2 to the 60th power. Eb = Exabit or 1,000,000,000,000,000,000 (Quintillion) bits

ZB = Zettabyte = 2 to the 70th power. Zb = Zettabit or 1,000,000,000,000,000,000,000 (Sextillion) bits

YB = Yottabyte = 2 to the 80th power. Yb = Yottabit or 1,000,000,000,000,000,000,000,000 (Septillion) bits

3.5 inch HD diskette 1.44 MB | Big Novel: War & Peace |

Standard CD 650-700 MB | Encyclopedia |

DVD 17 GB | Small town library |

HD-ROM 165 GB | 10 Full-length movies + |

Hard Disk 1-5 TB | All the text in Burlington's Fletcher Free library |

Zoo's Hard Disk Array ~100.0 TB | One Hundred times all the printed text in Bailey Howe library + |

Zoo's backup tape drive 50 Peta Bytes | >500 Bailey Howe Librarys |

Link to another table of examples of how many bytes for information: http://searchstorage.techtarget.com/sDefinition/0,,sid5_gci944596,00.html