Colts, cats, cows or even human beings are input-output systems. Journalism, politics, law service, hospitals are complicated input-output systems as well. Simpler examples: phones and radios, cameras and microphones, typewriters, guitars - and tea cups.
some input / output-systems, compare:
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all photos by frizztext, click on the images to enter his flickr photo stream
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- Android – How to manipulate text before output to app? (stackoverflow.com)
Flickr Comments 
Great photo, Frizz! Love the color of the pool and the water rushing out…
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I love your pool image, especially the other way round as yesterday!
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yes Gilly Gee, I thought
horizontal widescreen would be
better than vertical square …
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Love the bubbles in the water.
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TRUE! Good point!
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The photo of the water in the pool is amazing. Makes me want a drink of cold water.
BE ENCOURAGED! BE BLESSED!
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Loved it! You are always surprising me with your choices for these, as I know that I sometimes do you as well!! blessings~ T
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Amazing. One of my favorites.
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Input-output systems – interesting way to look at humans, animals, etc. But definitely true and accurate!
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CYBERNETICS =
http://en.wikipedia.org/wiki/Cybernetics
“… cybernetics began as an interdisciplinary study connecting the fields of control systems, electrical network theory, mechanical engineering, logic modeling, evolutionary biology, neuroscience, anthropology, and psychology in the 1940s, often attributed to the Macy Conferences. Other fields of study which have influenced or been influenced by cybernetics include game theory, system theory (a mathematical counterpart to cybernetics), perceptual control theory, sociology, psychology (especially neuropsychology, behavioral psychology, cognitive psychology), philosophy, and architecture and organizational theory …”
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Output systems–I will be chuckling about this one all night!
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Awesome shot! 😀 Love it!
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