evolution of

Computer

Since man is born with intelligence, he thought of ways that would make things easy for him. One of the problems encountered by man was counting the things he had. Because of this, he invented something that could help him count fast and easy.

The AbacusAbout 4,000 years ago, the Chinese

invented the ABACUS. It is an adding tool that can help can you

add & subtract numbers by moving beads back & forth on rods. The abacus was one of the earliest

counting devise invented to help man solve his counting problems.

EARLY COMPUTING DEVICES

THE ABACUS

In 1642, Blaise Pascal, a French mathematician, invented the Pascal calculator. This device, also known

as the Pascaline, operated 8 movable dials, which could add numbers up to 8 figures long. It

was used to perform simple arithmetic calculations. This device

was limited to addition & subtraction only.

THE PASCALINE

CALCULATOR

THE PASCALINE CALCULATOR

In 1673, Gottfried Leibntiz, a German mathematician &

philosopher, enchanced the Pascaline by creating a device that could also multiply. It can

even find the square root of number. The device was called

the Leibnitz Calculator/ machine.

LEIBNITZ CALCULATO

R

LEIBNITZ CALCULATOR/MACHINE

In 1801, Joseph-Marie Jacquard, a Frenchman, invented the Jacquard’s

loom. Jacquard’s loom used punch card to program

pattern that were outputted as woven fabrics by the loom.

JACQUARD’S AUTOMATIC LOOM

JACQUARD’S AUTOMATIC LOOM

Difference EngineIn 1822, Charles Babbage, a

British mathematician professor, invented the

Difference Engine. Powered by steam & as large as a

locomotive, the machine had the capacity to perform calculations

& print the results.

ELECTRO-MECHANICAL COMPUTING DEVICES

DIFFERENCE ENGINE

In, 1833, several years after Babbage worked on the Difference Engine, he began working on the first general-

purpose digital computer, which he called the Analytical Engine. This steam-powered engine outlined the basic

elements of today’s modern general-purpose computer and was a

breakthrough concept.

ANALYTICAL ENGINE

ANALYTICAL ENGINE

Electronic Computing Devices

In 1889, Herman Hollerith, an American inventor, invented the Hollerith’s

Tabulating Machine . The machine was a punch card reader & had the capacity

to store & process data. Hollerith brought his punch card reader into the

business world, founding the Tabulating Machine Company which later became International Business Machine (IBM)

in 1924.

HOLLERITH’S TABULATING

MACHINE

HOLLERITH’S TABULATING MACHINE

This all-electronic calculator was invented by Howard H.

Aiken in 1930. This was used to create ballistic charts for the U.S. Navy. The Mark 1 is

called the Harvard-IBM Automatic Sequence

Controlled Calculator.

MARK 1

MARK I

Between 1943 and 1946, the ENIAC or the Electronic

Numerical Integrator and Computer was developed by

John Presper Eckert and John Mauchly. This general purpose computer computed at a speed

1,000 times faster than the Mark 1.

ENIAC

ENIAC

Today’s

Computers

Supercomputers are the most powerful computers made. Supercomputers

are used to process huge amount of data for

complex processes such as nuclear fission.

SUPERCOMPUTERS

SUPERCOMPUTERS

Mainframe computers are the largest among the

computers in use today. Mainframe computers are

used where many people in large organizations are

frequently accessing similar information.

MAINFRAME COMPUTERS

MAINFRAME COMPUTERS