SUPER COMPUTER These are the largest, fastest and most expensive computers. The cost is several millions of dollars and the speed is between 600 million to 900 million instructions per second (MIP). Another name for super computer is MONSTER. Scientists in weather forecasting, exploration make use of super computers. It can also be used for […]
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DIGITAL COMPUTER This is the most common type of computer today. It measures physical quantities by counting. Examples are calculator, digital wrist watches, digital fuel dispenser etc. ANALOGUE COMPUTER This type of computer is used to measure and process continuous data such as speed, temperature, heartbeat etc. Examples are speedometer, thermometer etc. HYBRID
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Consider the table below: Generations Of computers Year of development The Technology Used Characteristics Software Instruction Storage Capacity First 1951-1958 Vacuum tube Very big and slow in operation Machine language Small internal storage Second 1959-1964 Transistor Less heat generation High level & Assembly Core storage Third 1965-1975 100-1000 Chips Introduction of integrated circuit
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FIRST GENERATION OF COMPUTERS Electronic machine which was distinct from mechanical computers evolved about 1945. UNIVAC is a good example of this generation of computers. Computers of this generation were characterized by: They used Vacuum tubes. They were very large and expensive. They were very bulky. They had a low retentive memory. They generated a
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EARLY MECHANICAL COUNTING/CALCULATING DEVICES Abacus Slide rule EARLY ELECTRO-MECHANICAL COUNTING DEVICES John Napier bone Blaize Pascal machine Gottfried Leitbnitz machine Joseph Jacquard Loom Charles Babbage analytical machine EARLY ELECTRONIC COUNTING DEVICES Herman Hollerith punch card John Von Neumann machine Man has put in every effort to have better methods of calculations. As
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In this chapter, you shall learn about what is data and information; the difference between data and information. Attempt to distinguish between manual and electronic data processing. DEFINITION OF DATA The term data means any basic fact which may be input to some processing system. A processing system is one where computations, comparisons and
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