Amazon calls to mind a huge dinosaur in one of those "Jurassic Park" movies – those in the film pray the beast doesn't turn its malevolent eyes on them and start charging. Distributors of jan/san supplies may be feeling as if they're starting to draw this kind of unwanted attention from Amazon. And there's some evidence that it could be a legitimate worry.

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The reality is, when Amazon decides a particular market makes an attractive target, there is little that can be done to halt the invasion. Consider information provided by Jim Peduto, managing partner of Knowledgeworx, Endicott, New York. Peduto, who describes Amazon as a "master of logistics and customer convenience," says the company is successfully adding commercial and institutional markets to its vast repertoire.