Counter may refer to:

Mathematics and computing

Counter machine A counter machine or counter automaton is an abstract machine used in a formal logic and theoretical computer science to model computation. It is the most primitive of the four types of register machines. A counter machine comprises a set of on ...

, a subclass of register machines *

Counter (digital) In digital electronics, a counter is a sequential logic circuit that counts and stores the number of positive or negative transitions of a clock signal. A counter typically consists of flip-flop (electronics), flip-flops, which store a value repr ...

, an electronic circuit that counts rising or falling edges of a clock signal *

Loop counter In computer science, a for-loop or for loop is a control flow statement for specifying iteration. Specifically, a for-loop functions by running a section of code repeatedly until a certain condition has been satisfied. For-loops have two parts: ...

, the variable that controls the iterations of a loop *

Jeton Jetons or jettons are tokens or coin-like medals produced across Europe from the 13th through the 18th centuries. They were produced as counters for use in calculation on a counting board, a lined board similar to an abacus. Jetons for calcul ...

, a reckoning counter used on reckoning boards for calculations * Mechanical counter, a digital counter using mechanical components *

Tally counter A tally counter is a mechanical, electronic, or software device used to incrementally count something, typically fleeting. One of the most common things tally counters are used for is counting people, animals, or things that are coming and going ...

, a mechanical counting device *

Web counter A web counter or hit counter is a publicly displayed running tally of the number of visits a webpage has received. Web counters are usually displayed as an inline digital image or in plain text. Image rendering of digits may use a variety of f ...

, a counter that counts the number of visits to a web page *

Project COUNTER Project COUNTER or simply COUNTER (Counting Online Usage of Networked Electronic Resources) is an international non-profit membership organization of libraries, publishers, and vendors. The organization continually develops a standard, the ''Cod ...

, a standard for reporting usage statistics of electronic resources *

People counter A people counter is an electronic device that is used to measure the number of people traversing a certain passage or entrance. Examples include simple manual clickers, smart-flooring technologies, infrared beams, thermal imaging systems, Wi-Fi trac ...

, a device used to measure the number of people transversing a certain passage or entrance

Games and sport

Counter (board wargames) A counter is usually a small cardboard square moved around on the map of a board wargame A board wargame is a wargame with a set playing surface or board game, board, as opposed to being played on a computer or in a more free-form playing are ...

, a playing piece used in board wargames *

Counter run Counter may refer to: Mathematics and computing * Counter machine, a subclass of register machines * Counter (digital), an electronic circuit that counts rising or falling edges of a clock signal * Loop counter, the variable that controls the ite ...

, an offensive play in American football *

Counter turn A counter turn is a kind of one-foot turn in figure skating. Unlike three turns and brackets, where the entry and exit edges follow the same curve, in a counter the entry and exit are on opposite curves. When executing a counter, the skater tu ...

, an element in figure skating *

Counter (collectible card games) A counter is a gameplay mechanic used in collectible card games (CCG) that physically represents an effect generated by a card. It is represented by any number of small objects, usually glass beads, coins, dice A die (: dice, sometimes also ...

, a small item used to represent certain objects or conditions in a collectible card game *

Jones Counter The Jones Counter is a type of bicycle odometer which adds the function of a surveyor's wheel to a bicycle. It was developed in 1971 by Alan Jones to accurately measure the length of road running race courses. The counter has gears that drive a me ...

, measures distance bicycles travel

Linguistics and typography

* Counter (typography), an enclosed space in a letter-form * Measure word, a type of word in some languages ** Japanese counter word

Other uses

* Countertop, the flat surface of a counter * Bar (counter), a type of counter used in bars for food serving * Compter or counter, a small jail * Counter, the part of a ship's stern above the waterline that extends beyond the rudder stock (see nautical terms) * The Counter, a global hamburger restaurant chain * Frequency counter, an electronic instrument for measuring frequency

People with the name

* Nick Counter (1940–2009), American film and television executive * S. Allen Counter (1944–2017), American neuroscientist, polar explorer, and university administrator * See also Caunter, an associated surname