The document provides an overview of the history of computers, categorizing them into non-mechanical, mechanical, and electro-mechanical types. It highlights significant inventions such as the abacus, Pascaline, and the Analytical Engine, along with their inventors and primary functions. Key figures in the evolution of computing, including Charles Babbage and Ada Lovelace, are also mentioned.

1. COC 1: Install and Configure Computer System

2. History of Computers
Non – Mechanical Computers
Mechanical Computers
Electro – Mechanical Computers

3. • was an ancient memory aid device to
record and document numbers, quantities,
or even messages.
Non – Mechanical Computers
Tally Sticks

4. • The abacus was invented in Babylonia in 2400
B.C.
• The abacus in the form we are most familiar with
was first used in China in around 500 B.C.
• It used to perform basic arithmetic operations.
Non – Mechanical Computers
Abacus

5. • Invented by John Napier in 1614.
• Allowed the operator to multiply, divide
and calculate square and cube roots.
Non – Mechanical Computers
Napier’s Bone

6. • Invented by William Oughtred in 1622.
• Based on Napier's idea about logarithms.
• Used primarily for:
Multiplication, Division, Roots, Logarithm,
Trigonometry
Non – Mechanical Computers
Slide Rule

7. Tally Sticks
Abacus
Napier’s Bone
Non – Mechanical Computers
Slide Rule

8. • Invented by Blaise Pascal in 1642.
• It was its limitation to addition and
subtraction.
• It is too expensive.
Mechanical Computers
Pascaline

9. • Invented by Gottfried Wilhelm Leibniz in
1672.
• The machine that can add, subtract, multiply
and divide automatically.
Mechanical Computers
Stepped Reckoner

10. • The Jacquard Loom is a mechanical loom,
invented by Joseph-Marie Jacquard in 1881.
• It’s an automatic loom controlled by
punched cards.
Mechanical Computers
Jacquard’s Loom

11. • A mechanical calculator invented by
Thomas de Colmar in 1820.
• The first mass-produced calculating
machine.
Mechanical Computers
Arithmometer

12. Pascaline
Stepped Reckoner
Jacquard’ Loom
Mechanical Computers
Arithmometer

13. • Invented by Charles Babbage (Father of
Computer) in 1822.
Electro -Mechanical Computers
Difference Engine

14. • Invented by Charles Babbage (Father of
Computer) in 1834.
Electro -Mechanical Computers
Analytical Engine

15. • Lady Ada Augusta Byron Lovelace
• “The Enchantress of Numbers”
Electro -Mechanical Computers
First Programmer

16. • Invented by Herman Hollerith in 1890.
• To assist in summarizing information and
accounting.
Electro -Mechanical Computers
Tabulating Machine

17. • Also known as IBM Automatic Sequence
Controlled Calculator (ASCC).
• Invented by Howard H. Aiken in 1943.
• The first electro-mechanical computer.
Electro -Mechanical Computers
Harvard Mark 1

18. Difference Engine
Analytical Engine
Tabulating Machine
Electro -Mechanical Computers
Harvard Mark 1

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