HSEL
| Acronym | Definition |
|---|---|
| HSEL | High School Esports League (gaming) |
| HSEL | Harrow School Enterprises Limited (Harrow on the Hill, London, England, UK) |
| HSEL | High Speed Electronics Laboratory |
| HSEL | Harrow School Enterprises Ltd (Middlesex, UK) |
| HSEL | High-Speed Electrical Laparoscopic Morcellator (urology) |