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Lesson 3 Data processing

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Lesson 3 Data processing

  1. 1. Lesson
3

  2. 2. 3‐1
The
History
of
Computers
 3‐2
The
Earliest
Computing
Devices
 




 
1.
Abacus
 
 
 
2.
Napier’s
Bones
 
 



3.
Oughtred’s
slide
rule
 
 
 
4.
Pascal’s
Calculator
 
 



5.
Leibnir’s
Calculator
 
 



6.
Babbage’s
analytical
Engine
 


 
7.
Hollerith’s
Punched‐card
Machine

  3. 3.   Historical
records
will
tell
us
that
man
has
 invented
three
types
of
devices
to
assist
him
 in
calculating
and
processing
data.
They
are:
   Manual
mechanical

   Eletromechanical
   Electronic

  4. 4.   Manual‐mechanical
:
A
simple
mechanism

 powered
by
hand
   Abacus
   Slide
rule
   Electromechanical:
It
is
usually
powered

by
an
 electric
motor
and
uses
switches
and
relays.
   Household
electrical
appliances
   Calculators
   Punched
cards

  5. 5.   Electronic
:
a
device
which
has
its
principal
 components
circuit
boards,
transistors

or
 silicon
chips

and
the
like
   Modern
digital
computer

  6. 6. 3‐2
The
Earliest
 Computing
Devices
 1.  Abacus

  7. 7. 3‐2
The
Earliest
 Computing
Devices
 2.  Napier’s
 Bones


  8. 8. 3‐2
The
Earliest
 Computing
Devices
 3.
 Oughtred’s
 Slide
Rule

  9. 9. 3‐2
The
Earliest
 Computing
Devices
 4.
Pascal’s
 Calculator

  10. 10. 3‐2
The
Earliest
 Computing
Devices
 5.
Leibniz’s

 Calculator

  11. 11. 3‐2
The
Earliest
 Computing
 Devices
 6.
 Babbage’s
 Analytical
 Calculator

  12. 12. 3‐2
The
Earliest
 Computing
 Devices
 7.Hollerith’s
 Punched‐ card
 Machine




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