Decimal
The decimal system, also known as the base-10 numeral system, is the most familiar and widely used number system in everyday life. It uses ten symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. Each digit's position represents a power of 10, making it easy to perform arithmetic operations such as addition, subtraction, multiplication, and division. The decimal system is deeply ingrained in human culture and society, largely because humans have ten fingers, which historically influenced the way we count and develop numerical systems.
ASCII (American Standard Code for Information Interchange)
ASCII is a standard encoding system used to represent text characters in computer systems. Developed in the 1960s, ASCII assigns a unique 7-bit binary number to each character, allowing for the representation of up to 128 characters. These characters include uppercase and lowercase English letters, digits, punctuation marks, and control codes (e.g., newline and tab). ASCII was widely adopted because it provided a universal way to encode text across different systems, enabling interoperability. Although it has been largely replaced by more comprehensive encoding standards like Unicode, ASCII remains fundamental in programming, especially for basic text processing tasks.