COMPUTERs Of

MECHANICAL AGE

(14TH CENTURY)

JOHANN GUTENBERG

INVENTED THE MOVABLE METAL TYPE PRINTING

PROCESS IN 1450

JOHN NAPIER

-INVENTED THE “NAPIER BONES” IN 1617. A SET OF

WOODEN RODS, ALLOWING USERS TO MULTIPLY AND

DIVIDE LARGE NUMBERS AND FIND SQUARE AND CUBE

ROOTS

WILHELM SHICKARD

-INVENTS THE FIRST MECHANICAL

CALCULATOR IN 1623, IT CAN WORK WITH SIX DIGITS, AND CARRIES

DIGITS ACROSS COLUMNS.

WILLIAM OUGHTRED

-INVENTED THE SLIDE RULE IN 17TH

CENTURY

BLAISE PASCAL

-INVENTED THE MECHANICAL CALCULATOR IN 1642 CALLED

“PASCALINE” MADE UP OF CLOCK AND GEARS AND

LEVERS, AND COULD SOLVE BASIC MATH PROBLEMS

GOTTFRIED LEIBNITZ

-INVENTED A MACHINE IN 1672 CALLED “STEPPED RECKONER”

THAT COULD MULTIPLY 5 DIGIT AND 12 DIGIT NUMBERS

YIELDING UP TO 16 DIDGIT NUMBER

JOSEPH MARIE JACQUARD

-Developed an automatic loom, in 19th century, that was controlled by punched

card.

ARITHMOMETER (1820)

Invented by Charles Xavier de Colmar, a pin-wheel type

adding machines.

ANALYTICAL ENGINE (1837)

THE MECHANICAL CALCULATOR THAT TOOK

INFORMATION FROM A PUNCHED CARDS TO SOLVE AND PRINT MATHEMATICAL

OPERATIONS.

ELECTROMECHANICALAGE

18TH -19TH CENTURY

ELECTROMECHANICAL AGE

The discovery of ways to harness electricity was the key advance

made during this period. Knowledge and information could now be converted into electrical

impulses.

The Beginning of TelecommunicaTion

Alessandro Volta

-Invented the VOLTAIC PILE which is considered

to be the first source of stored electricity in the 8th

Century.

Telegraph

Samuel F.J. Morse invented the first magnetic telegraph in the

year 1832 and made an experiment version in 1815.

Telephone

The first successful bi-directional transmission of clear speech by Bell and Watson was made on 10 March 1876 when Bell spoke into his device, “Mr. Watson, come here, I want to see you.”

Marchese Guglielmo Marconi, known for his development of a

radiotelegraph system, now called radio in 1873.

RADIO

Electromechanical Computing

Pehr and Advard Scheutz (1853) complete their tabulating Machine, capable of processing fifteen-digit numbers, printing out results and rounding off to

eight digits.

Dorr Felt

Comptometer (1885) is a type of mechanical (or electro-mechanical)

adding machine.

COMPTOGRAPH- Comptometer with built-in printer.

Punched CardsA punch card or punched card (or punch card or Hollerith card or IBM card), is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined positions. It was used through the 20th century in unit record machines for input, processing, and data storage.

International Business Machines (IBM)Founded in 1896 as the Tabulating

Machine Company by Herman Hollerith, It was incorporated as Computing

Tabulating Recording Corporation (CTR) on June 16, 1911.

The Millionaire(1893)

The first efficient four-function calculator invented by Otto

Shweiger,

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