Computer is becoming more and more popular these days because of its capabilities in terms of speed, accuracy and versatility. The list of the application of a computer is almost impossible to specify here. However a few of these applications are listed below.
a) Banking and Financial Company
b) Education
c) Hospital
d) Communication
e) Library
f) Business and Industry
g) Entertainment and Advertisement
a) Banking and Financial Company:
Computers are used in banks and financial company for electronic money transfer, statistical report, voucher, ledger, balance sheet etc. New developments such as Automated Teller Machines (ATM’s) have made dealings with the banks easier. It helps to withdrew money easily.
b) Education:
Computer can be used as teaching learning tool, result processing, student data processing, question preparation, hands outs and note preparation etc. The educational software is used to teach children in the classrooms. Many universities offers distance education through Internet. Hence, computer science has become an integral core subject to the students in almost every school and college.
c) Hospital:
Computers are used for the medical research in health. It is used in hospitals by the doctors to have knowledge about the patients and their diseases. They help doctors in diagnosis and treatment of diseases and are also used to check heartbeat and blood pressure.
d) Communication:
Internet is playing very important role in communication using computers. One of the major services of Internet is e-mail or electronic mail. The advantage of this service is that while transferring the messages it saves time, money, avoids wastage of paper, and so on.
e) Library:
Computer software is used for the management of library. It is used for keeping books, borrowing books, records of updating books etc. The computerized system enables whether the books are issued or not.
f) Business and Industry:
The use of computers in business and industry improves their working efficiency. Record keeping like sales record, stock control, staff records, salary preparation etc becomes very easy. The cost of production goes down. Unpleasant and hazardous work can be performed by using robots. They are also used for sales forecasting, production planning etc.
g) Entertainment and Advertisement:
In different fields, computers are used for advertisement such as business advertisement, film advertisement, education advertisement etc. Computers are also used to create cartoon films. Animated films are made with the help of computers. Animation is the process of making an object move and is done with the help of computers.
Tuesday, December 7, 2010
Limitations of a computer
Although computers are very useful device and applied on various fields for every important work, but there are some limitations of it.
a) Computer cannot think anything on its own.
b) Instructions are needed to perform a task.
c) It needs electricity.
a) Computer cannot think anything on its own.
b) Instructions are needed to perform a task.
c) It needs electricity.
Characteristics/ Features of a computer
The increasing popularity of computer has proved that it is very powerful and useful machine. The power and usefulness of this popular machine is mainly due to the following features:-
a) Speed
b) Accuracy
c) Diligence
d) Versatile
e) Storage
f) Automatic
g) Reliability
a) Speed: - Computer can work at a very high speed. The time taken by the computer to execute instruction is very fast. Its processing speed is measured in a fraction of a second.
Millisecond (KHZ) - a thousandth of a second. (Kilo Hertz)
Microsecond (MHZ) - a millionth of a second. (Mega Hertz)
Nanosecond (GHZ) - a billionth of a second. (Giga Hertz)
Pico second (THZ) - a trillionth of a second. (Tera Hertz)
b) Accuracy: - Though the computer does its work with a very high speed, it does not make any mistake unless the user gives it a wrong instruction. Computers are 100% accurate. But if we feed wrong data to the computer, it returns the same wrong output or information called GIGO (Garbage in garbage out).
c) Diligence: - Computers can work for many hours continuously without taking any rest and without decreasing its speed, accuracy and efficiency. It is free from tiredness, lack of concentration, fatigue etc.
d) Versatile: - Computer is a versatile machine which can do varieties of task such as simple calculation to a complex and logical operation. It is used in various fields for various purposes.
e) Storage: - Computer has mass storage section where we can store large volume of data for future work. Such data are easily recall from the secondary storage devices like floppy disk (FDD), hard disk (HDD), compact disk (CD) etc.
f) Automatic: - Once the instruction to do any work is given to the computer, the computer does its work automatically by itself.
g) Reliability: - Since computer can do its work very fast, without making any mistake and without taking rest and is able to store data for future use, it is a very reliable or trustworthy machine.
a) Speed
b) Accuracy
c) Diligence
d) Versatile
e) Storage
f) Automatic
g) Reliability
a) Speed: - Computer can work at a very high speed. The time taken by the computer to execute instruction is very fast. Its processing speed is measured in a fraction of a second.
Millisecond (KHZ) - a thousandth of a second. (Kilo Hertz)
Microsecond (MHZ) - a millionth of a second. (Mega Hertz)
Nanosecond (GHZ) - a billionth of a second. (Giga Hertz)
Pico second (THZ) - a trillionth of a second. (Tera Hertz)
b) Accuracy: - Though the computer does its work with a very high speed, it does not make any mistake unless the user gives it a wrong instruction. Computers are 100% accurate. But if we feed wrong data to the computer, it returns the same wrong output or information called GIGO (Garbage in garbage out).
c) Diligence: - Computers can work for many hours continuously without taking any rest and without decreasing its speed, accuracy and efficiency. It is free from tiredness, lack of concentration, fatigue etc.
d) Versatile: - Computer is a versatile machine which can do varieties of task such as simple calculation to a complex and logical operation. It is used in various fields for various purposes.
e) Storage: - Computer has mass storage section where we can store large volume of data for future work. Such data are easily recall from the secondary storage devices like floppy disk (FDD), hard disk (HDD), compact disk (CD) etc.
f) Automatic: - Once the instruction to do any work is given to the computer, the computer does its work automatically by itself.
g) Reliability: - Since computer can do its work very fast, without making any mistake and without taking rest and is able to store data for future use, it is a very reliable or trustworthy machine.
Monday, December 6, 2010
Definition of Computer
A computer is an electronic device that accepts input, processes data, store data and produces output all according to a series of stored instructions.
In other words it can be defined as an electronic device that processes the input data according to the given set of instructions to give meaningful output or information.
In other words it can be defined as an electronic device that processes the input data according to the given set of instructions to give meaningful output or information.
Subscribe to:
Posts (Atom)