Computer is used in all branches of science to collect and analyze data. The scientists also use internet to collect the latest information around the world. Today, it is impossible to carry out scientific researches without use of computers. In all branches of science, it is mainly used to get accurate experimental results, for example to tget accurate forecasting of weather etc.

In the field of publishing, computer is playing very important role such as to publish the books, magazines and newspapers etc. The publishers use computer and word processors and graphics software to design pages of the books or magazines. Many writes and publishers use Internet to collect information that is used for compliling a new book of magazine. Some websites allow you to download and entire book, called an electronic book (e-book). The journalists also use the notebook computers and digital cameras to capture and record news.

7. Traveling

Computer is also playing very important role in traveling by car or airplane to arrive easily and safely at your destination. Today many vehicles manufactured use special electronic equipments in the car that controls various activities of the car. These cars have GPS (Global Positioning System) receiver that reports your vehicle's location. These cars also have "Onboard Navigation Systems" that have the following featuers.

• Track the vehicle if it is stolen
• Provide emergency services
• Provide directions
• Provide roadside assistance
• Perform remote diagnostics if a warning light appears on the dashboard
• To make hotel and restaurant reservations

Today many vehicles also include options such as screens with e-mail and internet access, printers, fax capability etc. Airlines also provide online access. The passengers can connect their notebook or hand held computer to the web during their flights. Some airlines also provide web surfing devices to their passenger during their flights.

Computer are also used in cars to monitor fluid levels, temperatures, electrical systems etc. It is also used to monitor the air traffic etc.

8. Government

A government runs the country by making policies and provides citizens with up-to-date information. Most of the government departments have their own websites. The computers are used in all government departments have their own websites. The computers are used in all government offices to perform various activities. The government agencies use computers as part of their daily routine.

9. Home

Like other electronic devices used in home such as T.V. set, washing machine etc. computer has also become the need of every person at home. It is used at home as an educational tool for children. But it is also used at home to keep records, write letters, prepare budgets, connect with others to send and get information on the internet, to watch films and to listen music or other entertainment etc.

10 Agriculture

In agriculture field also, computer is playing very important role. The agricultural scientists are computer for analyzing the agricultural data. The students of agriculture also uses computer to get latest information about agriculture on the internet. The farmers also use computer to get information about crops and to calculate bills and cost per acre as well as to get information about crops market prices.

11. Energy

Energy companies use computers to locate or search oil, coal, natural gas and uranium. Similarly electric power companies use computers to monitor the power networks. In addition, meter readers use hand held computers to record the units consumed in homes and business.

12. Industry

In industry, computers are used to control the manufacturing system and continuous running of the machinery. These also help in monitoring temperature [pressure, check the quality and accuracy and measurement needed in the manufacturing process.

In industry, robots are used to perform most of the activities as mentioned above. A robot is an automatic programmable machine that moves and preforms mechanical tasks. It means that a robot acts like human beings. Robot can work in environment that is dangerous for human being such as opening chemical packages and packages believed to contain bombs. It can perform repetitive tasks continuously without any break, at very high accuracy than human. Robots can also be used in hundreds of applications such as:

• Assembling & spray-painting cars
• Lifting of heavy equipments, power cables etc.
• Testing blood samples
• Performing experiments in artificial satellites and radioactive environment etc.