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LEIBNITZ’S CALCULATOR (1671 AD)

• In 1671 AD, Gottfried Leibnitz, a German
Mathematician, improved the Adding Machine and
invented a new machine capable of performing
multiplication and division also.

JACQUARD LOOM (1801 AD)

• This machine first gave the concept of stored program using metal
cards.

• It was the first computer manufactured.

• It is still in use today.

BABBAGE’S DIFFERENCE ENGINE

• Charles Babbage was a British mathematician. In
1822, he designed a machine called Difference
Engine. It aimed at calculating mathematical
tables.
• Since technology was not so advanced at that time,
this machine could not be made.

Supplement – Informatics Practices with Python–XI
BABBAGE’S ANALYTICAL ENGINE

• In 1833, Charles Babbage designed a machine called
Analytical Engine. It had almost all the parts of a
modern computer. Unfortunately, this machine could
not be built because of lack of technology. His designs
remained a concept.

• Babbage’s great designs earned him the title of ‘Father of
Computers’.

HOLLERITH’S TABULATING MACHINE

• Hollerith, a mathematician, invented a fast counting
machine named Tabulating Machine in 1880.

• This machine was used by the American
Department of Census to complete their 1880
census data.

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