How do you inscribe info. into a piece of metal?

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Programming a piece of metal, such as a chip or board, involves manipulating semiconductor materials through quantum mechanics, which allows for the creation of electronic switches that control the flow of electricity. These switches are not mechanical but are instead represented by peaks of magnetic fields within the metal. This technology is foundational to the operation of computers and other computer-based devices. Additionally, advancements in storage technology are anticipated, with projections for the development of one-petabyte disks by 2010, utilizing carbon nanotubes, capable of storing vast amounts of data, equivalent to the entire Library of Congress multiple times.
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How is it that you can "program" a piece of metal, such as a chip or board? I wish I knew! Is there a series of lines and dashes that do that? I'm completely baffled as to how someone gets a piece of metal to read another piece of metal and makes it into a working machine! :frown: [?] What is the basic mechanism at the base of all this that drives a computer or any other form of computer-based technology? What is the process that brings this all to life?
 
Computer science news on Phys.org
It's all thanks to the glories of quantum mechanics in play in a semiconductor, allowing you to make what is essentially a load of switches work together.
 
But it's important to realize that the "switches" mentioned are not physical or mechanical switches in the normal sense. They are peaks of magnetic fields in the metal. There's a good explanation at this site.

I understand that by 2010, a one-petabyte (1,000 terrabytes, or 1,000,000 Gig; enough disk-space to store the entire Library of Congress fifty times!) disk should be created, using carbon nanotubes.
 

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