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In the past twenty years, most of the major technological breakthroughs in
consumer electronics have really been part of one larger breakthrough. When you
get down to it, CDs, DVDs, HDTV, MP3s and DVRs are all built around the same
basic process: converting conventional analog information (represented by a
gradually fluctuating wave) into digital information (represented by 1s and 0s,
or bits). This fundamental shift in technology totally changed how we handle
visual and audio information -- it completely redefined what is possible.
The digital camera is one of the most remarkable instances of this shift
because it is so truly different from its predecessor. Conventional cameras
depend entirely on chemical and mechanical processes -- you don't even need
electricity to operate one. All digital cameras have a built-in computer, and
all of them record images in an entirely electronic form.
The new approach has proved monstrously successful. It may be decades before
digital cameras completely replace film cameras, if they ever do, but they will
probably account for around half of the U.S. market within the next few years.
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