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Tech famouspeople

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Computer History - famous people & machines

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Tech famouspeople

  1. 1. Abacus: used until calculators available! Used by Babylonians! Try an online abacus – need to have Java installed
  2. 2. Blaise Pascal <ul><li>Invented to do calculations </li></ul><ul><li>Only 50 made </li></ul><ul><li>No one wanted – afraid it would take their job! </li></ul>1642
  3. 3. Joseph Jacquard <ul><li>used punched cards for patterns </li></ul><ul><li>weaved intricate designs on his loom </li></ul>1801 made 1 st loom
  4. 4. Babbage & Byron mid 1800s
  5. 5. Charles Babbage <ul><li>Decided to build a reliable machine for accurate tables & calculations </li></ul>
  6. 6. Difference Engine <ul><li>Babbage’s 1 st machine </li></ul><ul><li>Designed to do only ONE task </li></ul><ul><li>Financial supported by government </li></ul>
  7. 7. Analytical Engine <ul><li>Babbage’s 2 nd idea </li></ul><ul><li>Couldn’t explain exactly WHAT it would do </li></ul><ul><li>Had it designed on paper and in head </li></ul>
  8. 8. Ada Byron: Countess of Lovelace <ul><li>Corresponded with Ada Byron who dealt with that part </li></ul><ul><li>Able to explain mathematical ideas </li></ul><ul><li>Great mathematician! </li></ul>Became known as 1 st Programmer!
  9. 9. But no one could understand a machine that could do anything… The idea was lost…
  10. 10. Babbage is: The Father of Computers Analytical Engine is blueprint for today’s computer
  11. 11. Herman Hollerith <ul><li>Statistician </li></ul><ul><li>Used punched cards in his machine </li></ul><ul><li>Saved lots of time on census! </li></ul><ul><li>Company later became IBM </li></ul>1880s
  12. 12. ABC Computer <ul><li>built in late 1930s at the University of Iowa </li></ul><ul><li>Built by John Atanasoff and assistant Clifford Berry </li></ul><ul><li>Not programmable </li></ul>“ inventor of 1 st electronic computer!”
  13. 13. ABC Computer Use electricity, vacuum tubes, binary numbers and capacitors.
  14. 14. Konrad Zuse’s Z1 <ul><li>First operational, general-purpose, programmable (that is, software controlled) digital computer. </li></ul><ul><li>reinvented Babbage's concept of programming </li></ul><ul><li>Used binary instead of decimal number system </li></ul>WWII 1941
  15. 15. British Collosus <ul><li>Programmable, digital, electronic computers </li></ul><ul><li>Built by British </li></ul><ul><li>Used to read encrypted German messages during World War II </li></ul>1943-44
  16. 16. Mark I <ul><li>55 feet long and 8 feet high. </li></ul><ul><li>5-ton device / 760,000 parts / 500 miles of wire </li></ul><ul><li>financed by IBM </li></ul><ul><li>switches to open and close its electric circuits </li></ul><ul><li>Used by the US Navy for gunnery and ballistic calculations, the Mark I was in operation until 1959. </li></ul>Howard Aiken Grace Hopper 1944
  17. 17. <ul><li>17,468 vacuum tubes </li></ul><ul><li>along with 70,000 resistors & 10,000 capacitors </li></ul><ul><li>It covered 1800 square feet (167 square meters) of floor space (imagine 10’ x 3’ x 60’) </li></ul><ul><li>weighed 30 tons, consumed 160 kilowatts of electrical power, and, when turned on, caused the city of Philadelphia to experience brownouts. </li></ul>ENIAC Mauchley and Eckert 1946
  18. 18. ENIAC
  19. 19. ENIAC
  20. 20. ENIAC

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