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Robert Mannell One of the earliest machines designed to assist people in calculations was the abacus which is still being used some years after its invention. In Blaise Pascal a famous French mathematician invented an adding machine based on mechanical gears in which numbers were represented by the cogs on the wheels.
His design contained the five key characteristics of modern computers: An American, Herman Hollerith, developed around the first electrically driven device.
It utilised punched cards and metal rods which passed through the holes to close an electrical circuit and thus cause a counter to advance. This machine was able to complete the calculation of the U.
The Harvard Mark 1 was completed in and was 8 feet high and 55 feet long. This machine was basically a small calculator. Inas part of the British war effort, a series of vacuum tube based computers named Colossus were developed to crack German secret codes.
The Colossus Mark 2 series pictured consisted of vacuum tubes. Presper Eckert of the University of Pennsylvania developed these ideas further by proposing a huge machine consisting of 18, vacuum tubes. It was a huge machine with a huge power requirement and two major disadvantages.
Maintenance was extremely difficult as the tubes broke down regularly and had to be replaced, and also there was a big problem with overheating. The most important limitation, however, was that every time a new task needed to be performed the machine need to be rewired. In other words programming was carried out with a soldering iron.
This allowed programs to be read into the computer and so gave birth to the age of general-purpose computers.
This generation is often described as starting with the delivery of the first commercial computer to a business client. The main defining feature of the first generation of computers was that vacuum tubes were used as internal computer components.
Vacuum tubes are generally about centimeters in length and the large numbers of them required in computers resulted in huge and extremely expensive machines that often broke down as tubes failed. The Second Generation Transistors were capable of performing many of the same tasks as vacuum tubes but were only a fraction of the size.
The first transistor-based computer was produced in Transistors were not only smaller, enabling computer size to be reduced, but they were faster, more reliable and consumed less electricity.EXAMPLE OF INFORMATIVE SPEECH OUTLINE Sarah Putnam Informative Outline Topic: The Titanic General Purpose: To Inform Specific Purpose: To inform .
A Short History of Computers and Computing Robert Mannell One of the earliest machines designed to assist people in calculations was the abacus which is still being used some years after its invention.
Cybercrime is defined as any crime involving computers or computer networks. This can include online credit card fraud, identity theft, harassment and bullying, and the Outline for Informative Speech. uploaded by. robazantout. Industrial Training Report. uploaded by. Sbm Odex. Cyber Crime. uploaded by. ReyMarkLacaden. How To Build A PC – Informative Speech Speech Topic: How To Build A PC I. Introduction A. (Attention getting device) Have any of you ever consider building your own PC? Open Document. Below is a free excerpt of "Informative Speech: Importance of Computer Outline" from Anti Essays, your source for free research papers, essays, and term paper examples/5(1).
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The informative speech topic that you choose to deliver your speech on, must live up to its name; it must have substantial information, and must swimmingly get across the audience.
This article presents to you a list of such topics. Cybercrime is defined as any crime involving computers or computer networks. This can include online credit card fraud, identity theft, harassment and bullying, and the Outline for Informative Speech.
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Sbm Odex. Cyber Crime.
uploaded by. ReyMarkLacaden. Choosing a good informative speech topic or informative essay topic can keep your audience entertained, your reader interested, and your own work process more enjoyable. Computers through the decades.
How airport biometrics systems work. an informative .