Introduction
Data warehousing acts as a great facility for the various users, as it consists of some tools that are very effective in the storage of the summarized information from multiple, heterogeneous databases in a single repository. In today’s corporate world, the organizations are able to generate data in a very large amount during the day to day business activities. This data acts as a very strong plus point for an organization but only if this data is able to provide very good information and is not just a collection of data. In such a scenario, where it is required to get valuable and important material extracted from a collection of data, data warehousing play a very essential and crucial role.

W.H Inmon is considered as the “father of data warehousing” and according to him data warehouse ‘is a subject – oriented, integrated, time – varying, non – volatile collection of data in support of the management’s decision making processes.’

Evolution of Data Warehousing
A typical data warehouse, in the starting evolves as a very large database (VLDBs) – consisting of data records in a very large amount. As a process, this technology develops gradually within an enterprise and the longer a data warehouse is used, the more it evolves. In the beginning, data warehousing was generally used in the processes like generation of reports, answering predefined queries etc. but now data warehouse finds its use not only in these operations but also in the analyzation of the data.
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Introduction
Internet can be defined as an electronic medium, which today is connecting the whole world with the help of the computers. Internet consists of large amount of data that can be accessed by the various users – and because of this it is also referred to as the ‘Information Superhighway’ of the world. With the help of the internet one can easily be in touch with any one in the whole world by sending electronic mail, by chatting etc., travel bookings can be made very easily, one can order books or buy anything online – in simple terms it can be said that internet provides a very strong connection or network between computers globally, bringing people and their working close to each other.
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1. Super computer – A super computer can be defined as a very strong, powerful machine though very costly but with a large primary storage.

Super computer is a very sophisticated system, because of this in the beginning its use was limited to only some of the operations like the scientific research, weather forecasting, military research etc, but now these machines are being used more commonly in business organizations etc. The use of super computers is very effective for performing functions that need very high speed and also need quick and complex computations.
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The computer hardware consists of the following –
1. The Central Processing Unit (CPU) – In general terms, the CPU is referred to as the brain of the computer as it operates and controls the various other parts of the computer system. CPU acts as the stage for carrying out various important activities like manipulating numbers, letters, symbols etc. The CPU further consists of two very vital units:-

a. The Arithmetic Logic Unit (ALU) – This unit of the CPU is responsible for performing the arithmetic operations as well as the logical operations.

The ALU is responsible for adding, multiplying, subtracting and dividing by understanding the nature of the numbers i.e. whether a number is positive or negative or is a whole number (a zero).
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1. First generation (1946 – 1956) – Includes those computers, which were based on the use of the vacuum tubes. Such computers were very big in size with limited values for memory and processing. The vacuum tubes were used for storage and processing of the data but these tubes generated a lot of heat and also used a great amount of power. These type of computers were used for scientific and engineering purposes, involving programming, firstly in the machine language and then in the assembly language. The main drawback of such a computer was that it had a very short life span – which further resulted in low MTBF (Mean Time Between Failure) of the order of an hour. For e.g. the ENIAC – had only 20 registers for storage and could only support 5,000 additions per second.
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