Date: Wed, 7 Oct 92 14:28:18 -0500


5.1)  Can shells be classified into categories?

      In general there are two main class of shells.  The first class
      are those shells derived from the Bourne shell which includes sh,
      ksh, bash, and zsh.  The second class are those shells derived
      from C shell and include csh and tcsh.  In addition there is rc
      which most people consider to be in a "class by itself" although
      some people might argue that rc belongs in the Bourne shell class.

      With the classification above, using care, it is possible to
      write scripts that will work for all the shells from the Bourne
      shell category, and write other scripts that will work for all of
      the shells from the C shell category.

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