The base 16 notational system for representing Real Numbers. The digits used to represent numbers using hexadecimal Notation are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F.
See also Base (Number), Binary, Decimal, Metadrome, Octal, Quaternary, Ternary, Vigesimal
References
Weisstein, E. W. ``Bases.'' Mathematica notebook Bases.m.