computer evolution

1. COMPUTER EVOLUTION

2. DIGIT
• A Latin word which refers to a finger or toe that indicates a
numerical quantity.
• This is first tools used for counting were man’s own finger.

3. Calculate
• It was derived from the Latin word “Calculus” which means
Pebble.

4. Abacus
• This first known mechanical computing device invented by man.
• The use of the word “ abacus dates back before 1387 when a
middle English work borrowed the word from Latin to describe a
sand board abacus.
• The Latin word came from “abakos” the Greek form of “abax” or
Calculating-table.

5. Napier’s bones
• This was the succeeding computing device after the Abacus
• It was developed in the year 1614 by a Scottish mathematician
named JOHN NAPIER
• It is a computing device used for multiplication and division of
large numbers through the use of a foldable tube.

6. Blaise Pascal
• A French mathematician, invented a device to add and subtract
large numbers
• Pascaline

7. STEP RECKONER
• Is an improved Pascaline machine developed by Gottfried Wilhelm
Leibniz in 1671.
• This is a device made of copper and steel. It can multiply, divide,
add and subtract numbers.

8. JACQUARD’S LOOM
• Uses punch cards to program designs on fabrics and carpets,
making it easier to be woven.
• It was invented by Joseph Marie Jacquard in 1801.

9. CHARLES BABBAGE
• Designed the Difference Engine in 1822.
• It was a first attempt to make an automatic, mechanical
calculator designed to tabulate polynomial functions.
• It can compute many useful sets of numbers, like both logarithmic
and trigonometric functions that can be approximated by
polynomials.

10. BABBAGE
• Continued to refine the mechanical general-purpose computer
which led to the origination of the Analytical Engine.
• It was described in 1837 but never completed.
• In its logical design, the machine was essentially modern,
anticipating the first completed general-purpose computer.

11. TABULATING MACHINE
• Was invented by an American invented by an American inventor,
Herman Hollerith.
• It was designed have a coding scheme and a mechanical tabulating
machine.
• This machine uses a punched card that can be electronically read
to process high volumes of data. Hollerith machine helped in
counting censuses in many countries.

12. 1939 and 1942
• John Vincent Atanasoff and Clifford Berry invented the first
electronic-digital computer.
• Called ABC ( Atanasoft –Berry Computer)
• Represented several improvement in computing, including binary
system of arithmetic, parallel processing, regenerative memory,
and separation of memory and computing function.