Other Uses
- The T.S. Playfair, a Canadian sail training vessel. Brigantine rigged.
- PlayFair - software that removes Apple's FairPlay DRM file encryption, now succeeded by Hymn
- Playfair Project
- Playfair cipher - a manual encryption technique invented in 1854 by Charles Wheatstone
- Playfair Cricket Annual
- Playfair Race Course
There is more than one crater named Playfair:
- Playfair (lunar crater)
- Playfair (crater on Mars)
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