everything he used to do with his body. The evolution of 
     weapons begins with the teeth and the fist and ends with 
     the atom bomb. Clothes and houses are extensions of 
     man’s biological temperature-control mechanisms. 
     Furniture takes the place of squatting and sitting on the 
     ground. Power tools, glasses, TV, telephones, and books 
     which carry the voice across both time and space are 
     examples of material extensions. Money is a way of 
     extending and storing labor. Our transportation networks 
     now do what we used to do with our feet and backs. In 
     fact, all man-made material things can be treated as 
     extensions of what man once did with his body or some 
     specialized part of his body. (3)

That outering or uttering of sense which is language and 
speech is a tool which “made it possible for man to accumulate