In digital logic and computing, a counter is a device which stores (and sometimes displays) the number of times a particular event or process has occurred, often in relationship to a clock signal.
Duodecimal
The duodecimal system (also known as base 12 or dozenal) is a positional notation numeral system using twelve as its base.
Binary number
□ In mathematics and digital electronics, a binary number is a number expressed in the binary numeral system or base-2 numeral system which represents numeric values using two different symbols: typically 0 (zero) and 1 (one).
Numerical digit
A digit is a numeric symbol (such as "2" or "5") used in combinations (such as "25") to represent numbers (such as the number 25) in positional numeral systems.
Quipu
Quipus, sometimes known as khipus or talking knots, were recording devices historically used in a number of cultures and particularly in the region of Andean South America.
Suzhou numerals
The Suzhou numerals or huama is a numeral system used in China before the introduction of Arabic numerals.
Leading zero
A leading zero is any 0 digit that comes before the first nonzero digit in a number string in positional notation.
Decimal
The decimal numeral system (also called base 10 or occasionally denary) has ten as its base.
Signed number representations
In computing, signed number representations are required to encode negative numbers in binary number systems.
Babylonian numerals
Babylonian numerals were written in cuneiform, using a wedge-tipped reed stylus to make a mark on a soft clay tablet which would be exposed in the sun to harden to create a permanent record.
Names of large numbers
This article lists and discusses the usage and derivation of names of large numbers, together with their possible extensions.
Computer number format
A computer number format is the internal representation of numeric values in digital computer and calculator hardware and software.
Repeating decimal
A repeating or recurring decimal is decimal representation of a number whose decimal digits are periodic (repeating its values at regular intervals) and the infinitely-repeated portion is not zero.
List of numeral systems
This is a list of numeral systems, that is, writing systems for expressing numbers.
Algorism
Algorism is the technique of performing basic arithmetic by writing numbers in place value form and applying a set of memorized rules and facts to the digits.