Hexadecimal is a base-16 numeral system, utilizing digits 0-9 and letters A-F to represent values. It is not an SI unit but is widely used in computing and digital electronics. The canonical definition involves powers of 16, where each position represents 16 raised to a power.
The hexadecimal system dates back to ancient cultures, but it gained prominence in the 20th century with the advent of digital computing. Key milestones include its use in early programming languages and as a shorthand for binary representation, which simplifies the readability of binary-coded data.
Hexadecimal is commonly used in programming, web design (e.g., color codes), and memory addressing. It is particularly valuable in computer science, where it provides a more human-readable format for binary data. Regions utilizing hexadecimal include the global tech industry, especially in software development.