Hash

Hash, hashes, hash mark, or hashing may refer to:

Substances

• Hash (food), a coarse mixture of ingredients
• Hash, a nickname for hashish, a cannabis product

Hash mark

• Hash marks, a marking on hockey rinks and gridiron football fields
• Hatch mark, a form of mathematical notation
• Number sign (#), also known as the hash mark, pound sign, or hashtag
• Service stripe, a military decoration
• Tally mark, a counting notation

Computing

• Hash function, an encoding of data into a small, fixed size; used in hash tables and cryptography
• Hash table, a data structure using hash functions
• Cryptographic hash function, a hash function used to authenticate message integrity
• Fragment identifier, in computer hypertext, a string of characters that refers to a subordinate resource
• Geohash, a spatial data structure which subdivides space into buckets of grid shape
• Hashtag, a form of metadata often used on social networking websites
• hash (Unix), an operating system command
• Hash chain, a method of producing many one-time keys from a single key or password
• Password hash
• Zobrist hashing, a method of hashing chess positions into a key

Other uses

• Hash House Harriers, a running club

See also

• Hash browns
• Hash House (disambiguation)
• All pages with titles beginning with Hash
• All pages with titles containing Hash