By: Kaitlyn  May 2011
Introduction <ul><li>Computers are the most widely used piece of technology throughout the world.  </li></ul><ul><li>The d...
The Abacus  <ul><li>The Babylonians created the first “computer” during the 4 th  century.  </li></ul><ul><li>It was calle...
Analog Computers <ul><li>Astronomical calculations eventually led the ancient Greeks and the medieval Muslim astronomers t...
The Invention Of Calculators  <ul><li>Wilhelm Shickard invented the mechanical calculator in 1623.  </li></ul><ul><li>Blai...
The Arithmometer  <ul><li>The arithmometer was based on the work of Gottfried Wilhelm Von Leibniz.  </li></ul><ul><li>It c...
The “Difference Engine”  <ul><li>The “difference engine” is a massive steam-powered mechanical calculator that could print...
The “Tabulating Machine”  <ul><li>Herman Hollerith designed something called the “tabulating machine” in 1890.  </li></ul>...
IMB’s Great Success  <ul><li>Around 1941, American Howard Aiken and several of IMB’s greatest engineers got together.  </l...
Microcomputers <ul><li>Microcomputers are compact digital computers that run by a microprocessor.  In 1971 microprocessors...
The Altair 8800 <ul><li>The first minicomputer was the Altair 8800, created by MITS. </li></ul><ul><li>The disadvantage of...
Bill Gates & Paul Allen  <ul><li>Bill Gates and Paul Allen offered computer software called BASIC, to MITS.  </li></ul><ul...
After The Introduction Of Altair <ul><li>After the Altair, many more microcomputers were developed.  </li></ul><ul><li>Ste...
Present Day Computers  <ul><li>Computers have come a long way from the simple abacus.  </li></ul><ul><li>They have also be...
Bibliography  <ul><li>http://www.pcbargainhunter.com/articles/history-of-the-computer.html   </li></ul>
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Computer History

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Computer History

  1. 1. By: Kaitlyn May 2011
  2. 2. Introduction <ul><li>Computers are the most widely used piece of technology throughout the world. </li></ul><ul><li>The development of computers was a gradual process that started more than 2,000 years ago! </li></ul>
  3. 3. The Abacus <ul><li>The Babylonians created the first “computer” during the 4 th century. </li></ul><ul><li>It was called an abacus which is an instrument that was used in different cultures for making fast arithmetic and astronomical calculations. </li></ul>
  4. 4. Analog Computers <ul><li>Astronomical calculations eventually led the ancient Greeks and the medieval Muslim astronomers to invent the astronomical analog computers. </li></ul><ul><li>The first ever analog computer that you could program was Al-Jazari’s astronomical clock, which was invented in 1206. </li></ul>
  5. 5. The Invention Of Calculators <ul><li>Wilhelm Shickard invented the mechanical calculator in 1623. </li></ul><ul><li>Blaise Pascal added gears to this invention in 1642, but it was not a success because the gears would jam. </li></ul><ul><li>Charles Thomas created the first mass produced calculator in 1820. It was called the arithmometer . </li></ul>
  6. 6. The Arithmometer <ul><li>The arithmometer was based on the work of Gottfried Wilhelm Von Leibniz. </li></ul><ul><li>It could add, subtract, multiply and divide. </li></ul>
  7. 7. The “Difference Engine” <ul><li>The “difference engine” is a massive steam-powered mechanical calculator that could print, invented by Charles Babbage. </li></ul><ul><li>The British government cancelled the project. </li></ul><ul><li>Charles Babbage to work on another project called the “analytical engine” which was a mechanical computer that was capable of solving any mathematical problem. </li></ul>
  8. 8. The “Tabulating Machine” <ul><li>Herman Hollerith designed something called the “tabulating machine” in 1890. </li></ul><ul><li>The device could automatically read census information that had been punched into a card. </li></ul><ul><li>This was a very successful creation and Herman built a firm called IBM, where he marketed the device! </li></ul>
  9. 9. IMB’s Great Success <ul><li>Around 1941, American Howard Aiken and several of IMB’s greatest engineers got together. </li></ul><ul><li>They designed a large automatic digital computer and called it Harvard Mark I. </li></ul><ul><li>Their creation was a huge success! </li></ul>
  10. 10. Microcomputers <ul><li>Microcomputers are compact digital computers that run by a microprocessor. In 1971 microprocessors were invented. They made it possible for almost anyone to have their own computer. </li></ul><ul><li>At first computers were limited to the military, universities, and very large companies. </li></ul><ul><li>The microprocessor made it possible for microcomputers and minicomputers to be created. </li></ul>
  11. 11. The Altair 8800 <ul><li>The first minicomputer was the Altair 8800, created by MITS. </li></ul><ul><li>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. </li></ul><ul><li>This prompted two young hackers, William Gates and Paul Allen. </li></ul>
  12. 12. Bill Gates & Paul Allen <ul><li>Bill Gates and Paul Allen offered computer software called BASIC, to MITS. </li></ul><ul><li>The computer software could help computer scientists program microcomputers. </li></ul><ul><li>The two men later created their own company, which is now known as Microsoft. </li></ul>
  13. 13. After The Introduction Of Altair <ul><li>After the Altair, many more microcomputers were developed. </li></ul><ul><li>Steve Jobs and Steve Wozniak designed Apple computers. </li></ul><ul><li>Tandy Radio Shack created the TRS-80. </li></ul><ul><li>IMB created the IMB PC for home markets. </li></ul><ul><li>After time, it was Apple and IMB that raced each other in providing home markets with computers. </li></ul><ul><li>They both were determined on designing attractive and user-friendly personal computers. </li></ul>
  14. 14. Present Day Computers <ul><li>Computers have come a long way from the simple abacus. </li></ul><ul><li>They have also become more dependable and easier to use. </li></ul><ul><li>There are plenty of different types of computers on the market. </li></ul><ul><li>They include; mainframes, desktops, laptops, tablet PCs, media centers, and personal digital assistants. </li></ul>
  15. 15. Bibliography <ul><li>http://www.pcbargainhunter.com/articles/history-of-the-computer.html </li></ul>

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