HSL (disambiguation)
- Bell HSL
- HSL (Fortran library)
- HSL 1
- HSL 2
- HSL 3
- HSL 4
- HSL Logistik
- HSL and HSV
- HSL-Zuid
- Haslemere railway station
- Hausa Sign Language
- Hawaiʻi Sign Language
- Health and Safety Laboratory
- Helsinki Regional Transport Authority
- High-speed launch
- Hindustan Shipyard
- Hispania Líneas Aéreas
- Hormone-sensitive lipase
- Huslia Airport
- Hybrid solar lighting
- Kühne Logistics University
- List of inactive United States Navy helicopter squadrons
- Staff Selection Commission