All language subtitles for 5_Revisiting Abstraction
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Earlier in this course,
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we talked about how programs
are instructions that are given to a CPU.
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We can send binary code or
bits to our CPU,
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then they'll use an instruction
set to run those commands.
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But these CPUS might be from
different manufacturers and
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may have different instructions.
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There might even be all kinds of different
hardware components like video cards and
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hard drives that also have
their own special interfaces.
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So how do we write a program that
the hardware can understand?
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Well, one way would be to write a program
for each possible combination of CPU and
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hardware using the native languages and
interfaces of these components,
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but there are potentially millions of
possible configurations of hardware.
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So how do we get anything to work with
all this complex and diverse hardware?
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Well, thanks to the efforts
of computer scientists and
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the principle of abstraction,
we can now use programming languages to
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write instructions that can
be run on any hardware.
1588
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