Data Information and Codes

Data are the names given to basic facts such as names and numbers. Examples of data are unit price, quantity sold, times, dates, product, names , addresses, tax codes etc.

Information is processed data, that is, information is data which have been converted into a more useful form. For example : total price * quantity sold. Here total price is informatron and unit price, quantity sold are data.

Codes are used to reduce the volume of data. By coding, recording of data can be made less laborious, less prone to error and the data become more manageable and easier to manipulate.


Bus Organized Architecture : Basic Microcomputer Elements

A microcomputer contains many elements including the microprocessor. The microprocessor is typically a single large scale ha chip that contains the control and arithmetic circuits of a microcomputer. The RAM and ROM devices constitute the main memory. The RAM section consists of one or more IC chips. This section of memory is used to store programs and data that change during the course of operation. It also stores intermediate and final results of operation during execution of programs.

The ROM section, consisting of one or more IC chips, is used to store data and instructions that do not change. The input and output interface circuits, are required to allow the I/O devices to communicate with the rest of the computer. In some cases, the interfaces are the IC chips which interface the microprocessor to a variety of I/O devices. In other cases, the interface circuits are contained in a small circuit board popularly known as interface card or adapter.


Road accident by Mirsarai

Today 11-07-11 at 2 p.m. Very bed news for us. At this time 70-80 primary school students was died. This student was come a pikup car for Playing "BONGGO BONDHO" gold cup football tournament. Once time the pikup bus has fall down a channel and many students was dia. Really it was very sad news for us.


Computer classification based on capacity

This post is full classification based on capacity. Please read this full artical attentivly.

Capacity of a computer refers to the volume of data that a computer system can process. Previously a computers size was an indication of its capacity. With the current state of miniaturization, measurement of capacity is based on throughput of the computer. Throughput is the amount of processing that can be performed in a given amount of time based on throughput computer systems can be divided into four major categories.

1)  Microcomputers
2)  Minicomputers
3)  Mainframe computers and
4)  Supercomputers


What is number system on ComputerWhat is number system on Computer

Popular number systems in connection with digital computers are : decimal, binary, octal and hexadecimal. Basic characteristics of there number systems are given below.

Decimal system :

It is the most commonly used number system in real life. It has the following features.

Digits : 1,2,3,4,5,6,7,8,9 and 0, (total 10 digits)
 base :10 ( since total number of digits is 10)

Binary System :

Digital computers use binary numbers for internal operations. Features of the binary system are :

Digits:  0 and 1 ( total 2 bits, a bit a short of binary digit )
Base: 2 ( Since total number of digit is 2 )

Octal System:

This is a popular used number system. Basic features of this system are:

Digits:  0, 1, 2, 3, 4, 5, 6, and 7 ( total 8 digits )
Base:  8 ( since the total number og digits is 8)

Hexadecimal System:

It is a popular features for computers scientist, engineers and information technologist. Basic features of this system are:

Digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F ( total 16 digits)
Base: 16 ( since the total number of digits id 16)


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