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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 0’s and 1’s 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 Corporation, today
popularly known as IBM. Herman Hollerith
Hollerith’s Tabulating Machine
Evolution of Computers 9

