Playfair may refer to: *

Playfair (surname) Playfair is a Scottish people, Scottish surname. The family is mentioned in Charles_Rogers_(author), Charles Rogers' 1887 book ''Four Perthshire families: Roger, Playfair, Constable and Haldane of Barmony''. One of the earliest records of the name ...

Playfair (lunar crater) Playfair is a lunar impact crater that is located in the rugged southern highlands on the near side of the Moon. It was named after the Scottish geologist and mathematician John Playfair. It lies along the eastern rim of the eroded satellite cra ...

Playfair (Martian crater) Playfair may refer to: * Playfair (surname) * Playfair (lunar crater) * Playfair (Martian crater) * PlayFair, software that removes Apple's FairPlay DRM file encryption, now succeeded by Hymn * Playfair Project * TS ''Playfair'', a Canadian sa ...

* PlayFair, software that removes Apple's FairPlay DRM file encryption, now succeeded by

Hymn A hymn is a type of song, and partially synonymous with devotional song, specifically written for the purpose of adoration or prayer, and typically addressed to a deity or deities, or to a prominent figure or personification. The word ''hymn'' d ...

Playfair Project The National (formerly the Scottish National Gallery) is the national art gallery of Scotland. It is located on The Mound in central Edinburgh, close to Princes Street. The building was designed in a neoclassical style by William Henry Playfai ...

* TS ''Playfair'', a Canadian sail training vessel *

Playfair's axiom In geometry, Playfair's axiom is an axiom that can be used instead of the fifth postulate of Euclid (the parallel postulate In geometry, the parallel postulate is the fifth postulate in Euclid's ''Elements'' and a distinctive axiom in Euclidea ...

named after John Playfair *

Playfair cipher The Playfair cipher or Playfair square or Wheatstone–Playfair cipher is a manual symmetric encryption technique and was the first literal digram substitution cipher. The scheme was invented in 1854 by Charles Wheatstone, but bears the name of ...

, a manual encryption technique invented in 1854 by Charles Wheatstone *

Playfair Cricket Annual ''Playfair Cricket Annual'' is a compact annual about cricket that is published in the United Kingdom each April, just before the English cricket season is due to begin. It has been published every year since 1948. Its main purposes are to revie ...

Playfair Race Course Playfair Race Course (known as the Spokane Interstate Fair from 1901–1935) was the home of horse racing in Spokane, Washington, from 1901 The track started out as a four-furlong (half-mile) flat oval, and expanded to five furlongs () in 1946. ...

Lyon Playfair Library The Abdus Salam Library is the largest academic and research library of Imperial College London. The current library opened in August 1969, taking over from the original Lyon Playfair Library which had opened in 1959. The collection grew out of ...

, now called the Abdus Salam Library, at Imperial College London *''

Play Fair! ''Play Fair!'' was a landmark brochure produced by the San Francisco Order of the Sisters of Perpetual Indulgence, and it was a key method of combating the emerging AIDS crisis.''1982. Safer Sex: ‘Play Fair’'' Gay In The 80s, 20131982. Safer ...

'', an HIV/AIDS brochure

See also