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CHARLES BABBAGE’S ANALYTICAL ENGINE
In 1822, mathematician Charles Babbage developed a steam-
powered calculating machine, which he called the Difference Engine.
It has the size of an entire room. But even after working on this project
for 10 years, this machine never became a reality.
Charles Babbage
In 1833, he invented a machine called the Analytical Engine,
the first-ever working model of a mechanical computer,
a fully program controlled machine. This is why Charles
Babbage is known as the Father of Computers.
Analytical Engine
LADY ADA LOVELACE’S PROGRAMS
The instructions given to Babbage’s Analytical Engine were in the
form of 0s and 1s and the first person to introduce this concept was
Lady Ada Lovelace. Since she was the first to introduce the concept
of programming, she is known as the First Computer Programmer.
Lady Ada Lovelace
HERMAN HOLLERITH’S TABULATING MACHINE
Herman Hollerith, an army engineer, built a machine called the
Tabulating Machine in 1890. The machine read and stored data from
punched cards.
After the success of this machine, Hollerith formed a Computing
Tabulating Recording Company to sell his machine. Later in 1924,
his company became a part of International Business Machines Herman Hollerith
Corporation, today popularly known as IBM.
Tech Fact
Tabulating Machine was
used to gather information
for the 1890 census more
efficiently.
Hollerith’s Tabulating Machine
Evolution of Computers 9

