Hash
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Hash may refer to:
- Number sign, #, also called the pound sign
- Hashish, a psychoactive drug derived from the Cannabis sativa plant
- Hash Bash, an annual event in Ann Arbor, Michigan
- Hash (food), a coarse, chunky mixture of beef and other things, e.g. corned beef hash; cf. Hash brown
- Hash House Harriers, a drinking club with a running problem
- Hash function, a small digital "fingerprint" from any kind of data
- Cryptographic hash function, a hash function suitable for use in information security
- Hash table, a data structure associating keys with values using a hash function
- Associative array, an abstract data type often implemented as a hash table
- Geometric hashing, a method for efficiently finding geometric objects of the same or similar shape
- Hash, Inc., purveyors of fine 3D character animation software since 1987