I LEARN ABOUT
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Digital
Digital computer is a computer that performs calculations and logical operations with
quantities represented as digits, usually in the binary number system. Digital computers
operate using discrete electric signals rather than continuous. Digital computers are used to
process alphanumeric and graphical data.
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Application of Computer System
Different applications of computer system are as follows:
- Computers are primarily used to access the internet.
- Computers are helpful in education. Various educational institutions are using
computers to educate the students.
- Computers are being used in hospitals to keep record of patients and medicines.
- Computers are also being used in government sectors e.g. Income Tax
Department, Sales Tax Department, Weather Forecasting etc. Aadhaar card, PAN
Card, Driving Licence are the best example of computer application in
government services.
- Banking is totally dependent on computer systems. Online banking and use of
ATM machines also involved the computer systems.
- Computer has a lot of business applications e.g. billing, maintaining employee
records, payroll calculations etc.
- Computers are widely used in different fields of engineering e.g. civil
engineering, mechanical engineering, automobile engineering, industrial
engineering etc.
- Computer systems are very much useful in defence field. Computers are largely
used in modern weapons and missile control system.
- Computer systems are used in planes and ships.
- Computer systems are also used in digital marketing and advertisements.
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Mobile Devices
Mobile devices, which are small enough to carry in a pocket, usually do not have disk
drives. Instead, these devices store programs and data permanently on special memory
inside the system unit or on small storage media such as memory cards. You often can
connect a mobile device to a personal computer to exchange information between the
computer and the mobile device.
Smart Phones and PDAs
Offering the convenience of one-handed operation, a smart phone is an Internet-
enabled phone that usually also provides personal information management functions such
as a calendar, an appointment book, an address book, a calculator, and a notepad. In
addition to basic phone capabilities, a smart phone allows you to send and receive e-mail
messages and access the Web — usually for an additional fee. Some smart phones
communicate wirelessly with other devices or computers. Many also function as a portable
media player and include built-in digital cameras so that you can share photos or videos with
others as soon as you capture the image. Many smart phones also offer a variety of
application software such as word processing, spreadsheet, and games, and the capability of
conducting live video conferences.