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History of Computers. The Abacus. The First “Automatic” Computer Chinese Invented first attempt at automating the counting process. The abacus is a machine which allows the user to remember his current state of calculations while performing more complex mathematical operation. .

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The abacus
The Abacus

  • The First “Automatic” Computer

    • Chinese Invented

    • first attempt at automating the counting process.

    • The abacus is a machine which allows the user to remember his current state of calculations while performing more complex mathematical operation.

Forefathers of modern computers
Forefathers of Modern Computers

Gottfried Leibniz Wilhelm

Charles Babbage

Blaise Pascal

Invented one of the first mechanical calculators the pascaline
Invented one of the First Mechanical Calculators (The Pascaline)

Pascal’s Gear System

It worked like an odometer for counting kilometers.

Pascaline made for French currency.

Invented the binary system
Invented the Binary System

The binary system which is the foundation of virtually all modern computer architectures.

Used internally by modern computers.

Made up of 0s and 1s.

Used for card readers, electric circuits, and vacuum tubes.

Originated the concept of a programmable computer
Originated the concept of a programmable computer

*Babbage is credited with inventing the first mechanical computer, called the Difference Engine, that eventually led to more complex designs.

Part of Babbage's difference engine, assembled after his death by Babbage's son, using parts found in his laboratory.

In Babbage’s time, numerical tables were calculated by humans . At Cambridge, he saw the high error-rate of human calculations and started his life’s work of trying to calculate the tables mechanically.

The London Science Museum’s Difference Engine #2, built from Babbage’s design.

History of computers

1st Generation

Vacuum Tubes

1939 - 1954

A device used to create an electrical signal by controlling the movement of electrons in a low-pressure space.

Critical to the development of electronic technology.

Were bigger, not as efficient or reliable, didn’t last as long, more expensive than a transistor.

Eniac electronic numerical integrator and computer 1946
ENIAC – Electronic Numerical Integrator And Computer1946

The first general-purpose electronic computer. It was a digital computer capable of being reprogrammed to solve a full range of computing problems.

ENIAC was designed to calculate artillery firing tables for the U.S. Army’s Ballistic Research Lab, but its first use was in calculations for the hydrogen bomb.

History of computers


1951 – First Commercial Computer

  • It used 5,200 vacuum tubes.

  • Weight: 29,000 pounds (13 metric tons)

  • Consumed 125 kW

  • Performance: 1,905 operations per second

  • running on a 2.25 MHz clock

  • The machine was 25 feet by 50 feet in length

  • It had an internal storage capacity of 1,000

  • words or 12,000 characters.

History of computers

2nd Generation



*Is commonly used to switch electronic signals.

*The fundamental building block of modern electronic devices, and is used in radio, telephone, computers and other electronic systems.

*Cited as being one of the greatest achievements in the 20th century, and some consider it one of the most important technological breakthroughs in human history.

Can be packaged individually but most are found in integrated circuits.

History of computers

3rd Generation

Integrated Circuit

1959 - 1971

aka IC, microcircuit, microchip, silicon chip, or chip

Integrated circuits are used in almost all electronic equipment in use today and have revolutionized the world of electronics.

First integrated circuit – Jack Kilby – Texas Instruments

History of computers



The ARPANET (Advanced Research Projects Agency Network) created by ARPA of the United States Department of Defense during the Cold War, was the world's first operational packet switching network, and the predecessor of the global Internet.

4 th generation microprocessor 1971 1991
4th GenerationMicroprocessor1971 – 1991

incorporates most or all of the functions of a central processing unit (CPU) on a single integrated circuit.

reduced the cost of processing capacity.

History of computers

Microsoft – 1975

Bill Gates and Paul Allen approached Ed Roberts of MITS, creators of the new microcomputer, and promised to deliver the BASIC (Beginner's All-purpose Symbolic Instruction Code) interpreter.

They did so and from the sale Microsoft was born.

History of computers

Bill Gates

He is ranked consistently one of the world’s wealthiest and the wealthiest overall as of 2009. Net worth: 58 billion as of 2008.

Gates is one of the best-known entrepreneurs of the

personal computer revolution.

His 66,000 sq. ft. estate has a 60-foot swimming pool with an underwater music system, as well as a 2500 sq. ft. gym and a 1000 sq. ft. dining room.

As of Oct. 1, 2008, he has donated 35.1 billion to the Bill & Melinda Gates Foundation, which focuses on Education, Health Care, & Poverty.

Gates and his wife are very fond of F. Scott Fitzgerald’s The Great Gatsby, and inscribed in the library a sentence from the last page of the novel: "He had come a long way to this blue lawn, and his dream must have seemed so close that he could hardly fail to grasp it."

Seattle Weekly reports the 2008 tax of $1.06 million and the home's assessed value of $147.5 million

Paul allen
Paul Allen

According to Forbes Allen is the 32nd richest person in the world, worth about $10.5 billion.

Allen also has a multi-billion dollar investment portfolio.

Allen owns three professional sports teams: the Seattle Seahawks, the Portland Trail Blazers, and the Seattle Sounders FC – Major League Soccer, that began playing in the 2009 season.

Allen was diagnosed with Hodgkin's disease in 1983. His cancer was successfully treated, however, he did not return to Microsoft and began distancing himself from the company.

History of computers

Creation of Microsoft

  • BASIC- Beginner’s All-Purpose Symbolic Instruction Code (A programming language)

    • **Developed by Kemeny and Kurtz in 1964, two mathematicians at Dartmouth

    • **Simple, easy-to-understand syntax allowed students to quickly learn it.

    • **Provided ease of programming and easier debugging than machine code or assembly

History of computers

Other Programming Languages


    • -FORmulaTRANslator

    • -Used for science, math, & engineering


    • -Named after Blaise Pascal, forefather of modern computers

    • -Disciplined approach to structure and data description


    • Common Business Oriented Language

      • Data description stored separately from the program.

    • C

      • A general-purpose computer programming language

      • very popular today for system programming

History of computers

First Apple Computer

April 1, 1976

History of computers

First IBM PC

(International Business Machines Person computer)

August 1981

5 th generation world wide web internet 1991 beyond
5th GenerationWorld Wide Web / Internet1991 & Beyond

  • The Web can be used for:

    • Looking up information, Shopping for books, computers, or CD’s

    • Investigating or researching

    • Downloading pictures, games, or other files

  • The Web (World Wide Web) was developed at CERN lab in Zurich, Switzerland

    • Requires a client program (such as Firefox, NetScape or Lynx) and a server (HTTP) to send information to the client


  • New form of communicating

  • 2 things needed to view the internet

    • Internet connection

    • Browser

Internet vs world wide web
Internet vs. World Wide Web

  • Many people use the words “internet” and “world wide web” to mean the same thing. The internet is NOT the web.

  • The Internet is a massive network of networks.It connects millions of computers together globally

  • The World Wide Webis a way of accessing information over the Internet. It is an information-sharing model that is built on top of the Internet.

History of computers

Microsoft Office 2007 Released

January 30, 2007

PCs Today


*Graphical User Interfaces (GUI)

-Allows you to use a mouse

to control the computer

-Can run thousands of

different sets of instructions


History of computers



History of computers

The Future Computer population

-Bring an ordinary

tabletop to life.



Cell Phones of the Future.avi

Coffee Table Computers

Microsoft Surface – The Possibilities

History of computers

Modern Marvels populationTechnology Video

History of computers

Review population: Name: __________1. Why should we study the past, present, & future of computers?2. Who invented the 1st mechanical computer?3. What is the name of the 1st Automatic Computer?4. Who invented the Binary System?5. What is the name of the 1st commercial computer?6. Who invented the 1st mechanical calculator?7. What computer was used in making calculations for the hydrogen bomb?8. ARPANET was a predecessor of what?9. What is the difference between the World Wide Web and the Internet?10. 1st Generation of computers used what?11. 2nd Generation of computers used what?12. 3rd Generation of computers used what?14. 4th Generation of computers used what?15. What evolved during the 5th Generation of computers?16. What was your favorite part of the “History of the Computer” Unit?