Write 10000 words file on computer history
Answers
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computer history:- the computer as we know it today had its beginning with a 19 th century English mathematics professor name Charles Babbage ....other development continue until in 1946 the first general purpose digital computer , the electronic numerical integrator and computet was built .
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One of the most important developments was the introduction of devices that would record and hold information magnetically on magnetic tapes, discs and drums. A system was also developed of holding numbers magnetically in a series of small magnetically rings.
A second very important development was the invention, in 1948, of transistors. These were first used in computers in the early 1960’s to replace the thermion valves and diodes used in the earlier machines. This resulted in a considerable reduction in the size and a great increase in the power of computers.
A computer is essentially an apparatus which can perform a sequence of calculations without much human effort. Calculations which will take days to perform if done manually can be done within a few minutes using modern computers. There are two main types of modern computers: Analog and Digital.
Analog Computers: In these computers instead of using numbers variable physical quantities are used as the input, the input being proportional to the instantaneous values of these variable quantities. Current, voltage, resistance, capacitance, etc. are the variable quantities used. They use electrical circuits for the direct execution of mathematical operations, the typical operations including summation, differentiation and integration
The first electronic digital computer, known as the Electronic Numerical Integrator and Computer or NIIAC was developed at the University of Pennsylvania in 1947 by J. Prespher Eckert and John. W. Mauchly. In modern digital computer, desired circuits prearranged to duplicate mathematical processes perform the desired operations on the binary numbers.
Binary Code: The number system, using the figures 0 to 9, that we use in our day-to-day work is called the decimal system. In computers, the binary code, employing only figures, 0 to 1 is employed. In this code, the numbers are represented as follows:
Just as a number in the decimal system, like 3 7 2 5 can be written
Hybrid Computers: These are computer systems which contain both analog and digital devices in such a way that the properties of each of these can be used to greatest advantage.