A brief overview of the computer's fundamental past from about 600 B.C to the current era.

1. The History of the
Computer
“The computer was born to solve problems that did not
exist before.”

2. Objectives
•I can differentiate the different kinds of
computers based on their features.
•I can reflect back on how these
computers influenced the current
computers we use today.
•I can identify the computers through
their pictures or through their
descriptions.

3. Vocabulary
Word

4. C U E P R OM T

5. Computer
•is a machine that can be instructed to
carry out sequences of arithmetic or
logical operations automatically via
computer programming.
•Early computers were only conceived as
calculating devices. Since ancient times,
simple manual devices like the abacus
aided people in doing calculations.

8. Abacus (600 B.C)
•Is a simple counting device
originated in Babylonia over 2,500
years ago.
•It was later improved by the
Chinese.

9. Napier’s Rods
• Consists of 10 rods made
of ivory on which were
engraved the
multiplication table.
• It is manipulated by
placing the sticks side by
side such that it was
possible to multiply and
divide large numbers.
• Invented by John Napier.

10. Slide Rule
•Is invented by William Oughtred together
with Edmund Gunter.
•By sliding and positioning rulers based on
some rules, one could easily multiply
divide, extract roots and compute for
other mathematical values.

11. Pascaline
•Invented by Blaise Pascal.
•It used gearwheels that turn to complete
addition or subtraction.
•It could add or subtract up to 8-digits.

12. Leibniz calculator
•Invented by Gottfried Wilhel Leibniz.
•It is a mechanical calculating machine
capable of multiplication, division and
finding square roots.

13. Jacquard Loom
•It was built by Joseph – Marie Jacquard.
•It is a weaving machine that uses
punched cards to control the placements
of the thread to be woven by the loom.

14. Difference Engine
•It was designed by Charles Babbage.
•It was to be powered by a steam engine
and could be used to calculate and print
mathematical tables.

15. Charles Babbage
•The father of the modern
computer.
•Babbage is credited with
inventing the first
mechanical computer that
eventually led to more
complex electronic
designs, though all the
essential ideas of modern
computers are to be
found in Babbage's
Analytical Engine.

16. Analytical engine
•It is considered the forerunner of the
computer today.
•It contained the essential parts such as :
input unit, output unit , memory unit and
processing unit.

17. Ada Lovelace
• was an English
mathematician and writer,
chiefly known for her work
on Charles Babbage's
proposed mechanical
general-purpose computer,
the Analytical Engine.
• She was the first to
recognize that the machine
had applications beyond
pure calculation, and
published the first algorithm
intended to be carried out
by such a machine.

18. Hollerith’s Tabulating
Machine
•Developed by Herman Hollerith.
•Was the first electromechanical system
for recording , compiling and tabulating
data. It used punched cards to record
data.

19. Mark I
•Designed by Harvard researchers led by
Howard Hathaway Aiken.
•It was a collection of electromechanical
calculators, it was used by the US Army
for designing weapons during World War
2.

20. ABC
•Assembled by John Atanasoff and Clifford
Berry.
•It is considered as the first automatic
electronic digital computer.
•It used many newly invented digital
circuits designs.

21. ENIAC
•Electronic Numerical Integrator and
Computer
•It was initially built for US military to
calculate artillery shells and later used for
nuclear weapons, weather predictions
and tunnel designs.

22. EDVAC
•Electronic Discrete Variable Automatic
Computer, developed my Mauchly and
Eckert.
•The first digital computer that used a
stored program to control the computer.