Hash

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

Substances

• Hash (food), a coarse mixture of ingredients, often based on minced meat
• Hash (stew), a pork and onion-based gravy found in South Carolina
• Fossil hash, a rock composed primarily of fragmented fossils
• Hash, a nickname for hashish, a cannabis product

Marks and symbols

• Number sign (#), also known as the hash, hash mark, or (in American English) pound sign
  • Checkmate symbol in chess
• Hatch marks, hash marks or tick marks, a form of mathematical notation
  • The individual markings on a graduation (scale)
  • Hash mark (sports), a similar marking on hockey rinks and gridiron football fields
• Service stripe, a military and paramilitary decoration
• Tally mark, a counting notation

Computing

• Hash function, a small, fixed-size pseudorandom index derived in a deterministic way from data; used in hash tables and cryptography
  • Cryptographic hash function, a hash function used to authenticate message integrity
    • Hash chain, a method of producing many single-use keys from a master key or password
  • Geohash, a spatial data structure which subdivides space into buckets of grid shape
  • Hash table, a data structure using hash functions
    • hash (Unix), an operating system command for manipulating a hash table
  • Zobrist hashing, a method of hashing chess positions into a key
• URI fragment, in computer hypertext, a string of characters that refers to a subordinate resource

Other uses

• Hash (EP) ([#]), a 2020 EP by Loona

See also

• Fossil hash, a rock composed primarily of fragmented fossils
• Hachis parmentier, a name for shepherd's pie
• Hash browns
• Hash House (disambiguation)
• Hashtag, a form of metadata often used on social networking websites
• Hatching, graphic procedure and pattern
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