The Operating System
The operating system (OS) consists of the master of programs that manage the basic operations of the computer.
These programs provide the control and use of hardware resources, including disk space, memory, CPU time allocation, and peripheral devices.
They are also the interface between computer hardware and application programs, allowing end users can concentrate on their own tasks or application rather than on the complexities of managing the computer.
To be more specific, the operating system is used to control the hardware memory, schedule the execution of programs, and schedule input output traffic between the CPU and other devices.
A good operating system, can dramatically improve the effectiveness and the efficiency of program execution performance.
Many different operating systems are available for computers.
Some operating systems are designed for a microcomputer single user environment, and others are for multiple users.
The complexity of operating system is much higher in a multiple user operating system due to the management of computer memory and CPU time shared by many users.
Today, many computers use what is called an operating environment, which provides end users with a user friendly interface to use.
Some operating systems have a graphical user interface that provide visual clues such as icons and objects the help the users.
Each icon represents a folder, an application package, or file. By clicking icons, users can open a folder or use an application package.
The Operating System
Thursday, July 23, 2009
Saturday, July 18, 2009
What is A Computer?
What is A Computer?
The word “computer” comes from the word “compute” which means to calculate. So a computer is normally considered to be a calculating device that can perform arithmetic operations at enormous speed.
The electronic computer is the most versatile and efficient machine for processing data.
Generally, the word COMPUTER means Commonly Operated Machine Particularly Used for Training Education and Research.
More accurately, a computer may be defined as a device that operates upon information or data. Data can be anything like bio-data of various applicants when the computer is used for recruiting personnel, or the marks obtained by various students in various subjects when the computer is used to prepare results, or the details.
Thus, data comes in various shapes and size depending upon the type of computer application. A computer can store process and retrieve data as and when desires. The fact that computers process data is so fundamental that many people have started calling it a data processor.
A computer is an electronic device made up of electronic circuits and wires etc. In modern age, computer (which is nothing but just an electronic device) is the most advance tool for solving the wide range of practical problems.
More precisely computer is an electronic device which works under the instructions of stored programs, automatically accepting the supplied data to analyze and process the data to produce the information called the result or output of that processing.
It manipulates the number of symbols, which it accepts as input, process this input are reproduces this is as output in a formatted manner. The word computer has been derived form the word compute.
When computers were developed, it was thought that they would be fast calculating machines. But today most of the work done is of non-numerical in nature like processing the records of students or employees of details of passengers for reservation.
What is A Computer?
The word “computer” comes from the word “compute” which means to calculate. So a computer is normally considered to be a calculating device that can perform arithmetic operations at enormous speed.
The electronic computer is the most versatile and efficient machine for processing data.
Generally, the word COMPUTER means Commonly Operated Machine Particularly Used for Training Education and Research.
More accurately, a computer may be defined as a device that operates upon information or data. Data can be anything like bio-data of various applicants when the computer is used for recruiting personnel, or the marks obtained by various students in various subjects when the computer is used to prepare results, or the details.
Thus, data comes in various shapes and size depending upon the type of computer application. A computer can store process and retrieve data as and when desires. The fact that computers process data is so fundamental that many people have started calling it a data processor.
A computer is an electronic device made up of electronic circuits and wires etc. In modern age, computer (which is nothing but just an electronic device) is the most advance tool for solving the wide range of practical problems.
More precisely computer is an electronic device which works under the instructions of stored programs, automatically accepting the supplied data to analyze and process the data to produce the information called the result or output of that processing.
It manipulates the number of symbols, which it accepts as input, process this input are reproduces this is as output in a formatted manner. The word computer has been derived form the word compute.
When computers were developed, it was thought that they would be fast calculating machines. But today most of the work done is of non-numerical in nature like processing the records of students or employees of details of passengers for reservation.
What is A Computer?
Wednesday, July 1, 2009
Minicomputers and Mainframe Computers
Minicomputers and Mainframe Computers
Minicomputers
Minicomputers are most powerful than microcomputers in terms of multiples user environments.
In other words, a minicomputer can be used by many operators simultaneously.
Many businesses and other organizations use minicomputers for their information processing requirements.
The most powerful minicomputers are called super minicomputers.
Mainframe Computers
Mainframe computers are large computer systems that can handled hundreds of users, store large amounts of data, and process transactions at a high speed.
Mainframe computers use a very sophisticated computer operating systems to manage and control the whole system.
Mainframes usually require a specialized environment including air conditioning and raised flooring at allows computer cables to be installed underneath.
The price ranges for mainframes from several hundred thousands to several million dollars.
Minicomputers
Minicomputers are most powerful than microcomputers in terms of multiples user environments.
In other words, a minicomputer can be used by many operators simultaneously.
Many businesses and other organizations use minicomputers for their information processing requirements.
The most powerful minicomputers are called super minicomputers.
Mainframe Computers
Mainframe computers are large computer systems that can handled hundreds of users, store large amounts of data, and process transactions at a high speed.
Mainframe computers use a very sophisticated computer operating systems to manage and control the whole system.
Mainframes usually require a specialized environment including air conditioning and raised flooring at allows computer cables to be installed underneath.
The price ranges for mainframes from several hundred thousands to several million dollars.
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