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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 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
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
Info Byte
Tabulating Machine was used to gather information for the 1890 census more
efficiently.
9
Evolution of Computers

