Birth of the computer

hdadmin/ September 30, 2015/ Famous Inventions/ 0 comments

• Before the 1920s,computers (sometimes computers) were human clerks that performed computations. They were usually under the lead of a physicist. Many thousands of computers were employed in commerce, government, and research establishments. Most of these computers were women. Some performed astronomical calculations for calendars, others ballistic tables for the military.
• After the 1920s, the expressioncomputing machine referred to any machine that performed the work of a human computer, especially those in accordance with effective methods of the Church-Turing thesis. The thesis states that a mathematical method is effective if it could be set out as a list of instructions able to be followed by a human clerk with paper and pencil, for as long as necessary, and without ingenuity or insight .
• Machines that computed with continuous values became known as theanalog  They used machinery that represented continuous numeric quantities, like the angle of a shaft rotation or difference in electrical potential .
• Digital machinery, in contrast to analog, were able to render a state of a numeric value and store each individual digit. Digital machinery used difference engines or relays before the invention of faster memory devices .
• The phrasecomputing machine gradually gave away, after the late 1940s, to just computer as the onset of electronic digital machinery became common. These computers were able to perform the calculations that were performed by the previous human clerks .