http://www.faqs.org/docs/artu/ch01s06.html
excepts:


     Rule of Clarity: Clarity is better than cleverness.


     Rule of Simplicity: Design for simplicity; add complexity only
     where you must.


.....

More of the Unix philosophy was implied not by what these elders said but by what they did and the example Unix itself set. Looking at the whole, we can abstract the following ideas:

  1.

      Rule of Modularity: Write simple parts connected by clean
      interfaces.

  2.

      Rule of Clarity: Clarity is better than cleverness.

  3.

      Rule of Composition: Design programs to be connected to other
      programs.

  4.

      Rule of Separation: Separate policy from mechanism; separate
      interfaces from engines.

  5.

      Rule of Simplicity: Design for simplicity; add complexity only
      where you must.

  6.

      Rule of Parsimony: Write a big program only when it is clear by
      demonstration that nothing else will do.

  7.

      Rule of Transparency: Design for visibility to make inspection
      and debugging easier.

  8.

      Rule of Robustness: Robustness is the child of transparency and
      simplicity.

  9.

      Rule of Representation: Fold knowledge into data so program
      logic can be stupid and robust.

 10.

      Rule of Least Surprise: In interface design, always do the least
      surprising thing.

 11.

      Rule of Silence: When a program has nothing surprising to say,
      it should say nothing.

 12.

      Rule of Repair: When you must fail, fail noisily and as soon as
      possible.

 13.

      Rule of Economy: Programmer time is expensive; conserve it in
      preference to machine time.

 14.

      Rule of Generation: Avoid hand-hacking; write programs to write
      programs when you can.

 15.

      Rule of Optimization: Prototype before polishing. Get it working
      before you optimize it.

 16.

      Rule of Diversity: Distrust all claims for “one true way”.

 17.

      Rule of Extensibility: Design for the future, because it will be
      here sooner than you think.


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