Elemental carbon had long been thought to exist in only three physical forms: graphite, diamond and an amorphous form, of which charcoal is an example.

ECONOMIST: Space-age soot

This uses amorphous silicon, a noncrystalline form of silicon.

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For some, they take the form of external hard drives or a slice of the amorphous cloud.

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The ultimate amorphous switch, figured Ovshinsky, was the human brain, with about 100 trillion neural connections operating free-form to handle most tasks elegantly.

FORBES: Magazine Article