These are optional packages which calc can use if available:

  * Term-ReadLine-Gnu-1.13.tar.bz2
    The GNU Readline Perl Module
    Calc can use this to provide you with a nicer command line interface.
    Just install it normally, and calc will magically find it at runtime.

  * units-1.80.tar.gz
    Standard UNIX units coversion tool
    The .calc.code file contains wrapper functions for using this tool.

  * words.gz
    /usr/dict/words
    This is just a text file of words, one word per line.
    Unzip it, "mkdir /usr/dict/" if necessary, and "cp words /usr/dict/".
    The "spell" function in .calc.code expects to have this.