ADVANTAGES AND DISADVANTAGES OF COMPUTER:-
Every one has some advantages and also disadvantages so the computer has also some advantages to those who are successfully done their work through computer and also some disadvantages to those can’t work through computer. So let’s discuss in briefly.
ADVANTAGES:-
Using computers helps to alleviate time-consuming and monotonous tasks of cutting, pasting and retrieval of field notes and many more.
Computers are a useful aid to those who have to work to tight deadlines.
Programs can cope with both multiple codes and over-lapping codes which would be very difficult for the researcher to cope with without the aid of a computer.
Some software can conduct multiple searches in which more than one code is searched much more quickly and efficiently than by the researcher.
Programs can combine codes in complex searches.
Programs can pick out instances of pre-defined categories which have been missed by the researcher during the initial analysis.
Computers can be used to help the researcher overcome ‘analysis block’.
DISADVANTAGES:-
Programs cannot understand the meaning of text.
Software can only support the intellectual processes of the researcher – they cannot be a substitute for these processes.
A computer will not recognize this.
The software might be beyond an individual’s budget.
User-error can lead to undetected mistakes or misleading results.
Using computers can lead to an over-emphasis on mechanical procedures.
The computer has no IQ.
Monday, January 4, 2010
How Computer Works
HOW COMPUTER WORKS
It is very much important that How you use the computer. If you don’t know How to use the computer then there is no meaning of computer. So you must know the use of the computer. Let’s start….
In 4 ways the computer works such as:-
∙ MEMORY
∙ PROCESSING
∙ INPUT
∙ OUTPUT
MEMORY:-
Its work is only for the storage purpose. Memory is of different size and shapes. However there are two basic categories: short-term and long-term , Short term is the Primary memory including RAM, ROM, virtual, cache, and various long-term storage known as Secondary memory including HARD DISK, FLOPPY,COMPACT DISK etc devices. Each type of computer memory serves a specific function and purpose.
PROCESSING:-
The brains of the computer are the microprocessor. The microprocessor is often referred to as the CPU simply known as Central processing unit. The microprocessor is a chip the size of a postage stamp. The processor is the most important part of the computer. The microprocessor controls how data is sorted and directs the flow of data.
INPUT:-
We must feed the computer because the computer takes input for processing. Without an input device this would not be possible. The most common input device is the keyboard. There are lots of others such as: mice, trackballs, touch pads, touch screens, pens, joy sticks, scanners, bar code readers, video and digital cameras, and microphones through which we give input to the computer.
OUTPUT:-
After processing the computer gives us the output. The most common output device is the monitor, or screen. However most computer come with speakers and a printer which are excellent output devices.
It is very much important that How you use the computer. If you don’t know How to use the computer then there is no meaning of computer. So you must know the use of the computer. Let’s start….
In 4 ways the computer works such as:-
∙ MEMORY
∙ PROCESSING
∙ INPUT
∙ OUTPUT
MEMORY:-
Its work is only for the storage purpose. Memory is of different size and shapes. However there are two basic categories: short-term and long-term , Short term is the Primary memory including RAM, ROM, virtual, cache, and various long-term storage known as Secondary memory including HARD DISK, FLOPPY,COMPACT DISK etc devices. Each type of computer memory serves a specific function and purpose.
PROCESSING:-
The brains of the computer are the microprocessor. The microprocessor is often referred to as the CPU simply known as Central processing unit. The microprocessor is a chip the size of a postage stamp. The processor is the most important part of the computer. The microprocessor controls how data is sorted and directs the flow of data.
INPUT:-
We must feed the computer because the computer takes input for processing. Without an input device this would not be possible. The most common input device is the keyboard. There are lots of others such as: mice, trackballs, touch pads, touch screens, pens, joy sticks, scanners, bar code readers, video and digital cameras, and microphones through which we give input to the computer.
OUTPUT:-
After processing the computer gives us the output. The most common output device is the monitor, or screen. However most computer come with speakers and a printer which are excellent output devices.
BIGGNERS OF COMPUTER
ABOUT COMPUTER
Requirement invents Computer. In the other words Invention is the mother of the computer. There is a lot of history in the back of the computer, so here I gave a little information about the computer and its history.
Computer:-
Computer is a high speed electronic device which accepts data as input process it as per the user’s requirement and produce the output.
The abacus was the first aid for mathematical computations. Abacus can only work on addition and subtraction problems. It first discovered in China. In fact, the abacus was first used in 300 B.C. by the Babylonians. The abacus is still in use today.
In 1617 Scotsman named John Napier invented logarithms, which are a technology that allows multiplication to be performed via addition.
After that Napier invented the slide rule, first built in England in 1632 and still in use in the 1960's by the NASA engineers of the Mercury, Gemini, and Apollo programs which landed men on the moon.
After Leonardo da Vinci in the year between 1452 to 1519 made drawings of gear-driven calculating machines but no one can built it.
In 1642 Blaise Pascal, in the age of age 19, invented the Pascaline as dedicated towards his father who was a tax collector. Pascal built 50 of this gear-driven one-function but can’t sell one because only his poorness.
In 1642 Blaise Pascal, in the age of age 19, invented the Pascaline as dedicated towards his father who was a tax collector. Pascal built 50 of this gear-driven one-function but can’t sell one because only his poorness.
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