Fundamental of Computer
Fundamental of Computer : Computer is an electronic device that executes the instructions given in a program and controls the operations that are expressible in numerical or logical terms.There are different types of computers for different purposes. The types of computer are generally based on general performance levels. they are many types of computer Fundamental of Computer.
What is a Computer
Fundamental of Computer : Computer is an electronic device that executes the instructions given in a program and controls the operations that are expressible in numerical or logical terms.
Basically a Computer has four functions to perform
- accepts data input
- processes data processing
- produces data output
- store the output for further use
What makes a Computer powerful?
The power of Computer can be judged in the following parameters
Speed : A Computer can do billions of actions per second.
Reliability : A Computer can be considered as highly reliable as failures are usually due to human error , one way or another.
Storage : A Computer can store ample amount of data .
Types of Computer :
There are different types of computers for different purposes. The types of computer are generally based on general performance levels.
Personal Computer or Micro Computer :
Computers for personal use come in all shapes and sizes. their shape and size can range from tiny Personal Digital Assistant (PDA) to the hefty personal computer towers. More specialized models of personal computer are launched each week-trip planners , expense account pads , language translators etc.
An electronic stylus can be used to write on the screen through the tablet PC, just like with a pen and paper , only our words are in digital ink.
Mini Computer :
As the personal computer has become very powerful on its own,the mini computers have become of less importance. Initially the mini computer was designed to carry out some specific tasks, like engineering and Computer Aided Design (CAD) calculations . In fact , the ordinary new personal computer being much more powerful have replaced the mini computers.
The mainframe computer serves as a backbone for the entire business world. it is considered as the heart of a network of computers or terminals that allows a large number of people to work at the same time and on the same data. For the efficient working of the mainframe computer a specific type of environment is required-cold and dry.
Super Computer :
The super computer remain at the top of the heap in power and expense. They are used for the tasks that require massive calculations , like engineering design and testing , weather forecasting , economic forecasting, serious decryption , etc.
- On the basis of uses and working system a computer can have the following types.
Digital Computer :
They are high speed , programmable electronic devices that perform mathematical calculations , compare values and store the results. They recognise data by counting discrete signals representing either a high [‘on’] or low [‘off’] voltage stage of electricity.
Analog Computer :
It recognises data as a continuous measurement of a physical property. The name which is derived from the greek word analog denotes that the computers functions by similarities between two quantities thet are usually expressed as voltage or currents . They are powerful tools to solve different equation . The analog computer work on the supply of continuous electrical pulses.
Hybrid Computer :
It combines features of both analog and digital types are hybrid computer. They require that analog unit can be an integral part of CPU of digital computer and have direct input and output facilities. these computer are generally used for scientific research and applications and industrial purposes.
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