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Unformatted text preview: a computing machine Q. Who invented the first computer?
a) Steven Jobs
b) Alan Turing
c) John von Neumann
d) Bill Gates
e) AT & T
f) Charles Babbage"
(1830s)
" 3 turing machineTuring Machine
Alan Turing  British Mathematician
In 1936... he developed the concept of a
simple theoretical machine,
consisting of: the enigma machine is a not important its the ww2 thing • an infinitely long tape divided
into identical squares
• a scanner to read the tape. The Enigma Machine Turing Machine This Turing machine could:
1) move the tape to the right
2) move the tape to the left
3) print a slash
4) erase a slash
Turing proved mathematically that through this binary
code , one could devise and execute an indefinite number
of programs and that machines operating on this principle
could be constructed. Computer Programs he proved that through BINARY logic. the yuring machine is the conceptual
basis if the MODERN computer!!!!
important conceptual idea. digressionhe was homosexual and they treated him with drugs and lead to
depression and he commited suicide because of it NeumannSTORED PROGRAM!!!! it can command the turing hardware
by itself. John von Neumann  Mathematician
In the 1940s... he developed the idea of
devising a program to instruct the Turing
machine.
Idea of a stored program within the
computer s internal memory.... a
computer can prepare and execute
its own programs! 4 single electron recording occured at this timethey discovered
or came up with the idea of an Action Potentialits on or off
like a binary code. The Neuronal Model
They showed that:
• The operation of a nerve cell and its
connections could be modeled in terms of
logical elements .... there is a binary element...
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 Fall '08
 marcio

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