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...Topics discussed introduction hologram holography history of photography vs recording reading usages types holographic memory versatile discs hvd applications pm a is flat surface that under proper illumination appears to contain three dimensional image the nobel award winning science presents true recreation original object invented in by dennis gabor for use electron microscopy before invention laser leith and upatnieks applied light introduced an important off axis technique conventional d version scene photograph lacks depth perception film sensitive only radiant energy phase relation i e interference are lost freezes intricate wavefront carries all visual information view reconstructed what we would have seen if present at through window defined provides...