Hat (disambiguation)
- African trypanosomiasis
- Einstein problem
- Faith Hubley
- Gorgoroth
- HAT medium
- HATNet Project
- Haitian Creole language
- Handball Association of Thailand
- Handwoordeboek van die Afrikaanse Taal
- Hardware Attached on Top
- Hashed array tree
- Hat (Davy Graham album)
- Hat (comics)
- Hat District
- Hat Island (disambiguation)
- Hat matrix
- Hat operator
- Hat, Azerbaijan
- Hat, Berehove Raion
- Hat, Nepal
- Hat. (Mike Keneally album)
- Hats (disambiguation)
- Hatt (disambiguation)
- Hať
- Helicopter Air Transport
- Hellenic Aeronautical Technologies
- Help authoring tool
- Het (disambiguation)
- Hett (disambiguation)
- Hi-hat
- Histone acetyltransferase
- History Aptitude Test
- Hutchison Asia Telecom Group
- Jack McVitie
- John Hubley
- Les Miles
- List of Wander Over Yonder episodes
- Mr. Hat
- Rollin S. Sturgeon
- The Hat
- The Hat (book)
- The Hat (film)