Remember how, in "Star Trek," Captain Picard could tell a computer "tea, Earl Grey, hot" and, voilà, out of thin air, a hot, Early Grey tea would appear on a tray? That computer was called a Replicator. What it did was use software made of bits to create objects made of atoms. Believe it or not, replicators of a sort have already existed outside of science fiction for years.
Via Pierre Tran