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, the variable that controls the iterations of a loop * Jeton, a reckoning counter used on reckoning boards for calculations * Mechanical counter, a digital counter using mechanical components * Tally counter, a mechanical counting device * Web counter, 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 device used to measure the number of people transversing a certain passage or entrance

Games and sport

* Counter (board wargames), a playing piece used in board wargames * Counter run, an offensive play in American football * Counter turn, an element in figure skating * Counter (collectible card games), a small item used to represent certain objects or conditions in a collectible card game * Jones Counter, 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