Timeline
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Blaise Pascal (1623-1662) | Invented a mechanical calculating device called Pascaline. 1642. Device performs only addition. Device never worked properly.
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| Gottfried Wilhelm von Leibneiz (1646-1716) | Invented the Stepped Reckoner in 1670. Device was supposed to add, multiply, subtract and divide but malfunctioned.
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| Charles Babbage (1792-1871) | Analytical Engine - calculating machine that used punched cards to store information in 1842. Chief Collaborator was Ada Byron (1815-1852)
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| Herman Hollerith (1860-1929) | Invented the tabulating machine in 1890. Used electricity instead of gears to perform calculations.
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| John Atanasoff (1903-1995) Clifford Berry (1918-1963) | Atanasoff-Berry Computer (ABC) (1939) used binary number system used in computers today. Contains 100's of vacuum tubes.
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| Howard H. Aiken | Mark 1 (1944) The first large scale automatic digital computer. Considered by some to be the 1st universal calculator.
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| John Mauchly (1907-1980) J. Presper Eckert (1919-1995) | Worked on ENIAC (Electronic Numerical Integration and Calculator) in 1946. originally a project that was "top secret".
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| Alan Turing (1912-1954) | Developed idea of a universal machine in the late 20's and 40's. Called the Turing Machine. The "Enigma".
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| Jon von Neumann (1903-1957) | Built the EDVAC (Electronic Discrete Variable Automatic Computer) with Mauchly and Eckert in 1847. inspired the construction of EDSAC (Electronic Delay Storage Automatic Calculator) in 1949.
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| William Sshockley, John Bardeen and Walter Brittain | Transistor (1947) replaced many tubes, making computers smaller, less expensive and reliable.
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| Grace Murray Hopper (1906-1992) | Designed COBOL (Common Business Oriented Language) a programming Language. 1st Programmer for Mark 1.
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| Jack Kilby (1923-2005) | Developed the 1st integrated Circuit in 1958. Invented the 1st hand held calculator. Studied electrical engineering.
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| William Gates III (Oct 28, 1951 - Present) | Founder of Microsoft Corporation. Started Microsoft company in 1975 with Paul Allen.
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| Paul Allen (Jan 21, 1953 - Present) | Co-founder of Microsoft Corporation. Owner of Portland Trail Blazers.
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| Thomas and John Knoll | Software Engineers. Creators of Adobe Photoshop (1988)
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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