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Published byDipen Bhusal Modified over 5 years ago
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Introduction of Computer A computer is an electronic device which calculates the raw data and gives valuable information which is the result of processing. A computer is a programmable electronic machine that can perform a variety of tasks at very high speed and accuracy. It is also called processing and manipulating device.
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Appearance of Computer
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Features/Characteristics of Computer Characteristics of computer Accuracy : Computers are perfectly accurate i.e. they are 100% accurate. Storage: computer can store huge number of data. Diligence: A computer can work for long time without losing its accuracy and speed. Speed : The speed of computer is measured in fraction of a second which we call nano second or pico second. Reliability : computers are reliable since they have great speed and they are very accurate.
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Speed A computer can execute instruction or command at a very fast speed. Speed of a computer is affected by: clock cycle, cache memory, size of storage device, capacity of microprocessor etc. The time taken to perform any task by a computer is called speed of the computer. Millisecond One thousandth of a second (10 -3 ) (1/1000) Microsecond One millionth of a second of a second (10 -6 ) Nanosecond one billionth of a second (10 -9 ) Picosecond one trillionth of a second (10 -12 )
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Storage 1 bit0 or 1 1 Byte8 bits Nibble4 bits 1 KB1024 Byte 1MB1024 KB 1GB1024 MB 1 TB2024 GB 1PB2024 TB
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Word Length It is a processing capacity of a computer. The word length of a computer is in power of 2 for e.g. * bits, 16 bits, 64 bits and so on. A computer with word length of 64bits is also known as 64 bit computer. The grater the word length of a computer the higher the speed will be.
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Application areas of computers
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Education Sector
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Medical sector
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Financial sector
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Offices
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Entertainment sector
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Computer Peripherals The equipment connected with computer for its use are called computer. The computer peripherals in connection vary as required.
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ADVANTAGES OF COMPUTER It stores large amount of data It process data with high speed It can perform repetitive tasks it is an automatic machine It is a versatile machine
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Disadvantages of Computer It requires a normal temperature to operate All people cannot afford the computer It requires regular repair It requires skilled manpower to work with the computer
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Limitations of Computer It requires regular power supply to operate It is a non-intelligent machine. It cannot think and give the decisions Computer cannot memorize and recall It needed instructions to perform a task.
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Full forms: IBM – International Business Machine GIGO – Garbage in Garbage out ATM – Automated Teller machine ICU - Intensive Care Unit RAM – Random Access Memory ROM – Read only memory KB - Kilo byte MB - Mega Byte GB - Giga Byte TB - Tera Byte PB – Peta Byte
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Thank You Dipendra Bhusal E-mail: dipendrabhusal133@gmail.com
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