One may remember or forget these messages but briefly one takes them in, and for a moment they stimulate the imagination by way of either memory or expectation. The publicity image belongs to the moment. We see it as we turn a page, as we turn a corner, as a vehicle passes us. Or we see it on a television screen while waiting for the commercial break to end. Publicity images also belong to the ...

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This year marks a significant change in the recent history of hard disk drive development. During the final years of the last century and for the last two years the areal density of magnetic recording had been increasing at rates close to or exceeding 100% per year. That meant that each generation of hard disk drive had a digital data capacity that was close to twice that of the previous genera...