Turing's big contribution to CS (although he also built working
machines) was to define an abstract machine that emulated how a person
might calculate and use it to prove things about what was mathematically
possible to compute.
Babbage designed and tried to build a practical, programmable computer
that would both calculate and set type for ephemeris tables used for
celestial navigation. Babbage knew that major source of errors in
printed tables were typesetting errors. So he designed his machine to
press numbers into wet paper so that lead could be poured directly into
the impressions and make type automatically, thus eliminating the
typesetting error. Sadly, it was mechanically a bridge to far.
Brent
On 12/21/2018 11:13 PM, agrayson2...@gmail.com wrote:
What are the key differences between their contributions to computer
science? TIA, AG
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