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History of Computer.2

it was an ancient memory aid device to record and document numbers quantities or even messages

tally sticks

it is a mechanical device used to aid an individual in performing mathematical calculations. was invented in babylonia and first used in china to perform music arithmetic operations

abacus

allowed to operator to multiply divide and calculate square and cube roots by moving the rods around and placing them in especially constructed boards.
it was inventor by john napier in 1614

napier's Bones

it was invented by william oughtred in 1622 based on appears ideas about logarithms it was used primarily for multiplication division roots logarithms trigonometry. not normally used for addition or subtraction

slide rule

was invented by blaise pascal in 1642 it was its limitation to addition and subtraction and it is too expensive

pascaline

invented by Gottfried wilhelm leibniz in 1672. the machine that can add subtract and multiply and divide automatically

stepped reckoner

it is a mechanical loom invented by joseph marie jacquard in 1881. it is an automatic loom controlled by punch cards

jacquard loom

a mechanical calculator invented by thomas de Colmar in 1820. the first reliable, useful and commercially successfully calculating machine. the machine could perform the four basic mathematic functions. the first mass produced calculating machine.

arithmometer

it is an automatic mechanical calculator design to tabulate polynomial functions invented by charles babbage in 1822 and 1834

difference engine and analytical engine

in 1840 augusta ada byron suggests to babbage that he use the binary system. she writes programs for the analytical engine

first computer programmer

invented by per Georg scheutz in 1843 based on charles babbages difference engine. the first printing calculator

Scheutzian calculation engine

invented by herman hollerith in 1890. to assist in summarizing information and accounting

tabulating machine

also known as ibm automatic sequence controlled calculator (ascc) invented by howard H Aiken in 1943

harvard mark 1

the first programmable computer created by conrad zuse in germany from 1936 to 1938. required that the user insert punch tape into a punch tape reader and all output was also generated through punch tape

z1

it was the first electronic digital computing device invented by professor john atanasoff and graduate student clifford berry at iowa state university between 1939 and 1942.

atanasoff-berry computer (ABC)

it was the first electronic general purpose computer. completed in 1946 developed by john presper eckert and john mauchly

eniac

what does eniac stands for

electronic numerical integrator and computer

what does the univac 1 stand for

universal automatic computer 1

it was the first commercial computer designed by john presper ecker and john mauchly

univac 1

what does edvac stands for

electronic discrete variable automatic computer

the first third program computer designed by von Neumann in 1952 it has a memory to hold both a stored program as well as data

edvac

it is the first portable computer released in 1981 by the Osbourne computer corporation

osborne 1-the first portable computer

it was the first computer company founded in 1949 by john presper eckert and john Mauchly.

the first computer company was the electronic controls company

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