_________________

        /               /|   

       /_______________/ | 

       |    COMPUTER   | |  

       |     MEMORY    | |

       |_______________| |

       |               | |

       |_______________| |

       |     BUFFER    | |

       |               | |

       |__________     | |

       | practice |    | / 

       |__________|____|/ 

         _________________ 

        /_______________/|

        | sample text  | |

        | sample text  | |

        | :wq          | |

        |--------------| |

       /_______________/ /

       |______________|/   

           TERMINAL    

When you save your work, the buffer

copy is moved onto the disk for 

permanent storage.

    -----------

  /    DISK     \

 |               |

 |               |

 |               |

  \             /

    -----------

         _________________

        /               /|   

       /_______________/ | 

       |    COMPUTER   | |  

       |     MEMORY    | |

       |_______________| |

       |               | |

       |_______________| |

       |     BUFFER    | |

       |               | |

       |               | |

       |               | / 

       |_______________|/ 

         _________________ 

        /_______________/|

        | sample text  | |

        | "practice"   | |

        | $            | |

        |--------------| |

       /_______________/ /

       |______________|/   

           TERMINAL    

    -----------

  /     DISK    \

 |               |

 |    practice   |

 |               |

  \             /

    -----------

 ---------------->

 Press <CR> to continue.