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The History of Computers
What is a computer? ,[object Object],Monitor Floppy Disk Drive System Unit Keyboard CD-ROM /  DVD-ROM Drive Mouse
I- Ancient Counting Machines ,[object Object],[object Object],[object Object],2- The  Roman Numerals I II III IV V VI VII VIII IX  X 3- The  Arabic Numerals  (base 10) 0  1 2 3 4 5 6 7 8 9  10 Ancient Time
II- Mechanical Counting Machines ,[object Object],1642
II- Mechanical Counting Machines ,[object Object],[object Object],1673
II- Mechanical Counting Machines ,[object Object],1810
II- Mechanical Counting Machines ,[object Object],1852 1832 This device had mechanical problems similar to those that plagued Pascal and Leibniz.
The Invention of the Vacuum Tube ,[object Object],[object Object],1883
III- Electrical Counting Machines ,[object Object],[object Object],9-  The US census of the 1880 took 9 years to compile and led to inaccurate figures. To solve the problem,  Herman Hollerith  invented a calculating machine that used electricity 1888
III- Electrical Counting Machines ,[object Object],[object Object],[object Object],1888
II- Mechanical Counting Machines 10-  A partial working model of Babbage’s  Analytical  Engine  was completed in 1910 by his son…   used punched cards to store numbers. The design was no more successful than its predecessors.  1910
III- Electrical Counting Machines ,[object Object],1943 51  feet long and weighed over 5 tons
IV- Electronic Counting Machines 12-  The  ENIAC  was the  first  US-built all- electronic  computer built to perform ballistics calculations.  (Away from IBM) 1946
IV- Electronic Counting Machines * It was 1000X faster than Mark I, but it drew a lot of power that dimmed the lights of Philadelphia when it was switched on due to the use of Vacuum Tubes. * Mark I: 5 Additions / sec. * ENIAC: 5,000 Additions / sec. * ENIAC was made of 18,000 vacuum tubes. 1946
IV- Electronic Counting Machines ENIAC’s Problems: 1- short life of vacuum tubes 2- It runs a single program, which means rewiring by a group of technicians is needed to change the program!!! Solution:  the same group of researchers worked on another version of ENIAC that can store programs on punched cards that are much easier to manage and they came up with:  
IV- Electronic Counting Machines EDVAC  (electronic Discrete Variable Automatic Computer) (was never completed!) 13-  UNIVAC  (Universal Automatic Calculator) forty of these computers were sold to businesses. General Electric was the first company to acquire a UNIVAC. * The first UNIVACs were used in the  US Army ,  Air Force ,  Navy , and  Atomic Energy Commission . 1951
The Effect of World War II 1938 Back in time to the days of war… * During WWII,  the German Navy developed a cipher machine named  Enigma . The Enigma machine could automatically encode a message in such a way that only another Enigma machine could read decode it.
The Effect of World War II 1938 * In  1938  the Polish Secret Service managed to steal an Enigma machine that was smuggled to England. * Secretly the British developed a computer named  Colossus  that could decipher as many as 2,000 messages per day. That computer used Vacuum tubes and was the world’s first entirely digital computer. Surprisingly, though Colossus presented a similar technology to that of ENIAC, it had only 2,400 compared to 18,000 in ENIAC!!!
Two Inventions that changed the way computers are built!! 1946 1- The  Transistor The most significant single invention of  the modern era. It was invented by 3 scsientists at At&T’s Bell Labs. One of the first overseas companies was a Japanese company called Tokyo Telecommunications Laboratory. The company had troubles paying the license fee ($25,000) that company became in 1956 what’s called now Sony! it replaced the Vacuum tube.   * Transistors are smaller  (sometimes microscopic) * Fast and don’t need to warm up
Transistors on a circuit board Transistors Capacitor Resistors
Two Inventions that changed the way computers are built!! 1961 The  IC  revolutionized the entire electronic technology. Ex: The Pentium Processor contains 3.1 Million Transistors in 1.5 inch square! 2- The ( IC ) Integrated Circuit
How the processor (CPU) is placed on the Motherboard Intel 486 CPU RAM
1975 - 1981 The Altair The Apple I The Floppy Disk The Hard Disk MS-DOS
1981 - 1993 The IBM PC The Compaq  portable Computer The Apple Macintosh MS-Windows 3.0 The Pentium Chip
Intel Pentium Processors  PENTIUM PENTIUM II PENTIUM Pro

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History of Computers

  • 1. The History of Computers
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10.
  • 11. II- Mechanical Counting Machines 10- A partial working model of Babbage’s Analytical Engine was completed in 1910 by his son… used punched cards to store numbers. The design was no more successful than its predecessors. 1910
  • 12.
  • 13. IV- Electronic Counting Machines 12- The ENIAC was the first US-built all- electronic computer built to perform ballistics calculations. (Away from IBM) 1946
  • 14. IV- Electronic Counting Machines * It was 1000X faster than Mark I, but it drew a lot of power that dimmed the lights of Philadelphia when it was switched on due to the use of Vacuum Tubes. * Mark I: 5 Additions / sec. * ENIAC: 5,000 Additions / sec. * ENIAC was made of 18,000 vacuum tubes. 1946
  • 15. IV- Electronic Counting Machines ENIAC’s Problems: 1- short life of vacuum tubes 2- It runs a single program, which means rewiring by a group of technicians is needed to change the program!!! Solution: the same group of researchers worked on another version of ENIAC that can store programs on punched cards that are much easier to manage and they came up with: 
  • 16. IV- Electronic Counting Machines EDVAC (electronic Discrete Variable Automatic Computer) (was never completed!) 13- UNIVAC (Universal Automatic Calculator) forty of these computers were sold to businesses. General Electric was the first company to acquire a UNIVAC. * The first UNIVACs were used in the US Army , Air Force , Navy , and Atomic Energy Commission . 1951
  • 17. The Effect of World War II 1938 Back in time to the days of war… * During WWII, the German Navy developed a cipher machine named Enigma . The Enigma machine could automatically encode a message in such a way that only another Enigma machine could read decode it.
  • 18. The Effect of World War II 1938 * In 1938 the Polish Secret Service managed to steal an Enigma machine that was smuggled to England. * Secretly the British developed a computer named Colossus that could decipher as many as 2,000 messages per day. That computer used Vacuum tubes and was the world’s first entirely digital computer. Surprisingly, though Colossus presented a similar technology to that of ENIAC, it had only 2,400 compared to 18,000 in ENIAC!!!
  • 19. Two Inventions that changed the way computers are built!! 1946 1- The Transistor The most significant single invention of the modern era. It was invented by 3 scsientists at At&T’s Bell Labs. One of the first overseas companies was a Japanese company called Tokyo Telecommunications Laboratory. The company had troubles paying the license fee ($25,000) that company became in 1956 what’s called now Sony! it replaced the Vacuum tube. * Transistors are smaller (sometimes microscopic) * Fast and don’t need to warm up
  • 20. Transistors on a circuit board Transistors Capacitor Resistors
  • 21. Two Inventions that changed the way computers are built!! 1961 The IC revolutionized the entire electronic technology. Ex: The Pentium Processor contains 3.1 Million Transistors in 1.5 inch square! 2- The ( IC ) Integrated Circuit
  • 22. How the processor (CPU) is placed on the Motherboard Intel 486 CPU RAM
  • 23. 1975 - 1981 The Altair The Apple I The Floppy Disk The Hard Disk MS-DOS
  • 24. 1981 - 1993 The IBM PC The Compaq portable Computer The Apple Macintosh MS-Windows 3.0 The Pentium Chip
  • 25. Intel Pentium Processors PENTIUM PENTIUM II PENTIUM Pro