Business: A computer has high speed of calculation, diligence, accuracy, reliability, or versatility which made it an integrated part in all business organisations. 

1. Computer is used in business organisations for: 

• Payroll calculations 
• Budgeting 
• Sales analysis  
• Financial forecasting 
• Managing employees database 
• Maintenance of stocks etc

2. Banking: 

Almost every bank uses computers to keep the records of money transactions and financial documents. It is also used in this sector because of the speed, convenience and security it provides. 

3. Insurance: 

Insurance companies are keeping all records up-to-date with the help of computers. The insurance companies, finance houses and stock broking firms are widely using computers for their concerns. Insurance companies are maintaining a database of all clients with information showing- 

• procedure to continue with policies
• starting date of the policies
• next due installment of a policy 
• maturity date
• survival benefits

4. Education: 

Today computers has become an important part of one’s education because we are using computers, in every field. Without the knowledge of computer, we cannot get a job and perform well in it. Computers are used in class rooms by teachers to teach, maintain record of students, online learning, etc.

5. Marketing 

• Advertising: 

With computers, advertising professionals create art and graphics, write and revise copy, and print and disseminate ads with the goal of selling more products. 

• At Home Shopping: 

Home shopping has been made possible through use of computerised,catalogues that provide access to product information and permit direct entry of orders to be filled by the customers. 

6. Health Care: 

Computers have become important part of the functioning in hospitals, labs, and dispensaries. The computers are being used in hospitals to keep the record of patients and medicines. It is also used in scanning and diagnosing different diseases. ECG, EEG, Ultrasounds and CT Scans etc., are also done by computerised machines. 

7. Engineering Design:

Computers are widely used in Engineering purpose. One of major areas is CAD (Computer aided design). That provides creation and modification of images. 

Some fields are: 

• Structural Engineering: It Requires stress and strain analysis for design of Ships, Buildings, Budgets, Airplanes etc. 
• Industrial Engineering: Computers deal with design, implementation and improvement of integrated systems of people, materials and equipments.
• Architectural Engineering: Computers help in planning towns, designing buildings, determining a range of buildings on a site using both 2D and 3D drawings. 

8. Military: 

Computers are largely used in defence. Computers are helpful in making Modern tanks, missiles, weapons etc. Military also employs computerised control systems. 

9. Communication: 

Communication means to convey a message, an idea, a picture or speech that is received and understood clearly and correctly by the person for whom it is meant for. Communication has become very easy and simple through internet and email. Through email, we can send messages in a split-second to anybody in any part of the world. 

10.Government: 

Computers play an important role in the working of a government. Some major fields in this category are: 

• Preparation of Budgets 
• Sales tax department 
• Income tax department 
• Male/Female ratio calculation 
• Computerization of voters lists
• Computerization of driving licensing system 
• Computerization of PAN card 
• Weather forecasting