The computer

THE COMPUTER
The computer is basically a device for ingesting, judging, and otherwise processing or usefully modifying knowledge. Thus it enlarges brainpower in the same way that other man-made machines enlarge muscle power. Like man, the computer expresses knowledge in terms of symbols; man's symbols are letters and numbers, and the machine's symbols are electromagnetic impulses that represent letters and numbers. Although man must usually instruct or program the machine minutely, its chief present advantage is that it can manipulate symbols a million times faster than a man with pencil and paper, and can make calculations in a few minutes that might take man alone a century. An expert has remarked that the difference between doing a calculation by hand and by computer is the difference between having one dollar and having a million. Sometimes the difference is infinite; only a computer can calculate swiftly enough to analyze the data from a satellite, or to enable man to control the flight of a missile.


Artificial intelligence
(AI) is a wide-ranging tool that enables people to rethink how we integrate information, analyze data, and use the resulting insights to improve decision making—and already it is transforming every walk of life. In this report, Darrell West and John Allen discuss AI's application across a variety of sectors, address issues in its development, and offer recommendations for getting the most out of AI while still protecting important human values. Most people are not very familiar with the concept of artificial intelligence (AI). As an illustration, when 1,500 senior business leaders in the United States in 2017 were asked about AI, only 17 percent said they were familiar with it.^[1] A number of them were not sure what it was or how it would affect their particular companies. They understood there was considerable potential for altering business processes, but were not clear how AI could be deployed within their own organizations.

Electricity
Electricity is the greatest gift of science to mankind. We have reached a point of our civilization when electricity is used for all purposes. Without it, our existence will be impossible. Electricity is a source of energy. It is produced by a battery or a coil of wires or by dynamo machine. It is produced in thermal station and also in hydro-project.There are various wonders of electricity. The most important of all is electric fan and electric light. These two things have improved our living standard and also efficiency of work. Our houses, roads, offices and shops are lighted. It is difficult and sometimes impossible to work in an office where there is no light and fan.Students read comfortably in a room which is properly furnished with electric light and fan. Fan is not a luxurious thing. It is necessary to fight heat during summer. Electricity is essential to operate fan in summer and electric heater in winter. In cold winter, electric heaters warm our rooms. Electricity is a means of communication. Telegraph and telegram device is based on electricity. It is easy send messages to distant places. Telephone also functions due to electricity. Due to this facility, the world has become a familiar place for all. Fax-machine is the latest development. Thus, communication is possible due to electricity. Elect has enabled us to conquer time and space
Welding machine
Welding machines or welding guns or welders are among the most essential tools for a welding professional. Welding machines generate heat that melts metal parts, so that these parts can be joined. However, there is no single welding machine that is suitable for all welding projects.