Digital techniques have found their way into innumerable areas of technology. But the area of automatic digital computers is by far the most notable and most extensive. As you know, a computer is a system of hardware that performs arithmetic operations, manipulates data, and makes decisions.
In science, technology, business, and, in fact, most other fields of endeavor, we are constantly dealing with quantities; so are computers. Quantities are measured, monitored, recorded, manipulated arithmetically, observed, or in some other way utilized in most physical systems.in digital systems like computers, the quantities are represented by symbols called digital. Many number systems are in use in digital technology that represent the digits in various forms. The most common are the decimal. Binary. Octal, and hexadecimal systems.