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Computer History

May 18, 2015



  • 1. By: KaitlynMay 2011

2. Introduction

  • Computers are the most widely used piece of technology throughout the world.
  • The development of computers was a gradual process that started more than 2,000 years ago!

3. The Abacus

  • The Babylonians created the first computer during the 4 thcentury.
  • It was called an abacus which is an instrument that was used in different cultures for making fast arithmetic and astronomical calculations.

4. Analog Computers

  • Astronomical calculations eventually led the ancient Greeks and the medieval Muslim astronomers to invent the astronomical analog computers.
  • The first ever analog computer that you could program was Al-Jazaris astronomical clock, which was invented in 1206.

5. The Invention Of Calculators

  • Wilhelm Shickard invented the mechanical calculator in 1623.
  • Blaise Pascal added gears to this invention in 1642, but it was not a success because the gears would jam.
  • Charles Thomas created the first mass produced calculator in 1820. It was called the arithmometer .

6. The Arithmometer

  • The arithmometer was based on the work of Gottfried Wilhelm Von Leibniz.
  • It could add, subtract, multiply and divide.

7. The Difference Engine

  • The difference engine is a massive steam-powered mechanical calculator that could print, invented by Charles Babbage.
  • The British government cancelled the project.
  • Charles Babbage to work on another project called the analytical engine which was a mechanical computer that was capable of solving any mathematical problem.

8. The Tabulating Machine

  • Herman Hollerith designed something called the tabulating machine in 1890.
  • The device could automatically read census information that had been punched into a card.
  • This was a very successful creation and Herman built a firm called IBM, where he marketed the device!

9. IMBs Great Success

  • Around 1941, American Howard Aiken and several of IMBs greatest engineers got together.
  • They designed a large automatic digital computer and called it Harvard Mark I.
  • Their creation was a huge success!

10. Microcomputers

  • Microcomputers are compact digital computers that run by a microprocessor.In 1971 microprocessors were invented. Theymade it possible for almost anyone to have their own computer.
  • At first computers were limited to the military, universities, and very large companies.
  • The microprocessor made it possible for microcomputers and minicomputers to be created.

11. The Altair 8800

  • The first minicomputer was the Altair 8800, created by MITS.
  • The disadvantage of the Altair 8800 is that it had no software and the owner had to create their own personal software to use it.
  • This prompted two young hackers, William Gates and Paul Allen.

12. Bill Gates & Paul Allen

  • Bill Gates and Paul Allen offered computer software called BASIC, to MITS.
  • The computer software couldhelp computer scientists program microcomputers.
  • The two men later created their own company, which is now known as Microsoft.

13. After The Introduction Of Altair

  • After the Altair, many more microcomputers were developed.
  • Steve Jobs and Steve Wozniak designed Apple computers.
  • Tandy Radio Shack created the TRS-80.
  • IMB created the IMB PC for home markets.
  • After time, it was Apple and IMB that raced each other in providing home markets with computers.
  • They both were determined on designingattractive and user-friendly personal computers.

14. Present Day Computers

  • Computers have come a long way from the simple abacus.
  • They have also become more dependable and easier to use.
  • There are plenty of different types of computers on the market.
  • They include; mainframes, desktops, laptops, tablet PCs, media centers, and personal digital assistants.

15. Bibliography

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