Midterm Flashcards
(58 cards)
Electronic device that receives, processes,
produces and stores data/information.
Computer
A data processing device
Computer
a programmable, multiuse machine that
accepts data (raw facts and figures) and
processes, or manipulates it into information
we can use
Computer
was originally a job title:
it was used to describe human beings
predominantly female whose job is to
Perform repetitive calculations
Computers
Was an early aid for
mathematical computations
Abacus
invented logarithms
which is a technology that allows
multiplication via addition.
John Napier(1617)
Logarithm values where carved
on ivory sticks which are now called
Napier’s Bones
Napier’s bones lead to the
Invention of
Slide ruler
First built in England in 1632
and was used by the NASA engineers
of the Mercury, Gemini and Apollo
programs which landed men in the
moon
Slide ruler
built the
first working calculator
Wilhelm Shickard
built a mechanical calculator
which could add and subtract numbers up to
eight digits
Blaise Pascal
expanded Pascal’s design and built a
mechanical calculator that could also multiply
and divide
Gottfried Wilhelm von leibniz
invented
the first programmable loom in which
removable wooden punch cards were used to
represent patterns
Joseph Marie jacquard
incorporated punch cards in
his Difference engine, a steam-powered
mechanical calculator for solving
mathematical equations
Charles Babbage
envisioned a more powerful
computer called Analytical engine which is a
general-purpose, programmable computer
Charles Babbage
provided step-by-step
instructions or subrouteines for the Analytical
engine which led the computing industry to
recognize her as the world’s first programmer
Augusta ada byron
designed a machine to sort
and tabulate data for the 1890 U.S. census,
employing punch cards to encode census data
Herman Hollerith
a mechanical switch
that can be used to control the flow of
electricity through a wire, consists of a
magnet attached to a metal arm
Electromagnetic relay
constructed Mark I in 1944
Howard aiken
noted the “First actual
case of bug being found
Grace Murray hopper
invented by Lee de
Forest in 1906 replacing the use of
electromagnetic relays
Vacuum tubes
built the first electronic
computer, COLOSSUS, to decode encrypted
Nazi communications.
Alan turing
was designed by John Mauchly and
J. Presper Eckert to compute ballistics table
for the U.S. Army
ENIAC(Electronic Numerical Integrator and Computer)
a
piece of silicon whose conductivity can be
turned on and off using an electric current.
Transistor
