Analog Computer:
The main advantage of analog computer is that all calculations take place in parallel these are faster analog information is mechanical it processes limited accuracy.
Digital Computer:
The digital computer work upon discontinuous data. They convert the data into digits (binary 1 and 0). Digital computers very much faster then analog computers. Digital computers can further classified in two ways:
The main advantage of analog computer is that all calculations take place in parallel these are faster analog information is mechanical it processes limited accuracy.
Digital Computer:
The digital computer work upon discontinuous data. They convert the data into digits (binary 1 and 0). Digital computers very much faster then analog computers. Digital computers can further classified in two ways:
1.Purpose wise: Digital computers are classified into two types:
(a) Special purpose computer:
Is the one that is designed to perform a specific task.Instructions carry out the task are permanently stored in the machine.Computers are not versatile.
(b) General purpose computer:
Is the one that can work on different types of programs input. Programs are not permanently stored. These computers are versatile.
2.Size and performance wise:Computer can be classified in to following four types:
Is the one that is designed to perform a specific task.Instructions carry out the task are permanently stored in the machine.Computers are not versatile.
(b) General purpose computer:
Is the one that can work on different types of programs input. Programs are not permanently stored. These computers are versatile.
2.Size and performance wise:Computer can be classified in to following four types:
(a) Microcomputers: Microcomputer are also known as personal computers. This is the most prevalent form of computer and standard desktop.The first PC was built by IBM.
(b) Minicomputers: Minicomputers is type of computer. It is usually designed for real time dedicated as high performance for an operating system. Minicomputer are the digital Alpha.
(c) Mainframes: Mainframes which require high performance and generate. It process large numbers of transactions on mainframes. To process high volumes of ATM,check and electronic transaction. The most mainframes are manufactures.
(d) Supercomputers: Supercomputers are designed for ultra high performance tasks.
Supercomputer owned by government agencies. It is a generally accepted fact that the National Security Agency (NSA).
Computer system characteristics and capabilities:
1.Speed:The speed of a computer is closely related to the amount of data it must process.
2.Accuracy: Computer systems are particular adept at repetitive task because of their reliability.
3.Reliability: Computer system are widely accepted because of their exceptional reliability.
4.Storage Capability: System have total and instant recall of data and an almost unlimited capacity.
Characteristics of personal computer:
2.Accuracy: Computer systems are particular adept at repetitive task because of their reliability.
3.Reliability: Computer system are widely accepted because of their exceptional reliability.
4.Storage Capability: System have total and instant recall of data and an almost unlimited capacity.
Characteristics of personal computer:
1.Laptops:They are expensive than desktops, they very smaller in size.It has same power as of desktop computers.Weight around 3 to 5 kilograms.
2.Notebooks:They are powerful as desktop, the size is very small like a note book.
They are more costly, weight around 2 to3 kilograms.
They are more costly, weight around 2 to3 kilograms.
3.Palmtops:Also known as Personal Digital Assistant. The size of a human hand they can do word processing, spreadsheet calculations, handwriting recognition. They are not as powerful as the desktop computers.
4.Wearable computers:The size is very small, it can be worn on the body itself,It as smaller processing power.Its application in the field of medicine.
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