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Wednesday, 19 December 2018


COMPUTER FUNDAMENTALS. COMPUTER FUNDAMENTALS. A computer is an electronic machine that accepts data, stores and processes data into information. The computer is able to work because there are instructions in its memory directing it.

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COMPUTER THEORY ONE LINER USEFUL. A computer is a programmable machine designed to perform arithmetic and logical operations automatically and sequentially on the input given by the user and gives the desired output after processing.

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The four basic functions of a computer include processing, input, storage and output.
Introduction. A computer is a multipurpose electronic device that can receive, process and store data. They are used as tools in every part of society together with the Internet. Computers nowadays are complex; there are a lot of different components inside them, and they all serve different purposes

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There Are 3 fundamental elements of a computer. Monitor, Motherboard, CPU, RAM, Expansion cards / graphics card / sound card / network card, Power supply, Optical disc drive, Hard disk drive.

In the report, the basic structure of a computer system was described with diagram. Different components such as CPU, memory, BUS, input/output devices that form a computer system were identified and explained.

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Input -Input data is prepared in some convenient form for processing. The form will depend on the processing machine. For example, when electronic computers are used, the input data could be recorded on any one of several types of input medium, such as magnetic disks, tapes and so on.
Processing - In this step input data is changed to produce data in a more useful form. For example, paychecks may be calculated from the time cards, or a summary of sales for the month may be calculated from the sales orders. Output - The result of the proceeding processing step are collected. The particular form of the output data depends on the use of the data. For example, output data may be pay-checks for employees.CPU This type of software is tailor-made software according to a user’s requirements.

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Analog computers always take input in form of signals. The input data is not a number infect a physical quantity like temp., pressure, speed, velocity. Signals are continuous of (0 to 10 V).
Accuracy 1% Approximately. Example: Speedometer. Digital Computers

These computers take the input in the form of digits & alphabets & converted it into binary format.
Digital computers are high speed, programmable electronic devices. Signals are two level of (0 for low/off 1 for high/on). Accuracy unlimited. Examples: Computer used for the purpose of business and education is also an example of digital computers. Hybrid Computer The combination of features of an analog and digital computer is called a Hybrid computer. The main examples are central national defense and passenger flight radar system. They are also used to control robots.

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