| Acronym | Definition |
|---|
| HUP | Hangup (Unix command) |
| HUP | Howard University Press (Washington, DC) |
| HUP | Hrvatska Udruga Poslodavaca (Croatian: Croatian Employers' Association) |
| HUP | Hospital of the University of Pennsylvania |
| HUP | Hang up |
| HUP | Hungarian Unix Portal |
| HUP | Home Use Program |
| HUP | Hluhluwe-Umfolozi Park (South Africa) |
| HUP | Heisenberg Uncertainty Principle |
| HUP | Hosei University Press (Hosei University; Tokyo, Japan) |
| HUP | Hardware Upgrade Program |
| HUP | Hot Uniaxial Pressing |
| HUP | Heavy Utility Personnel (military vehicle) |
| HUP | Hold Until Published |
| HUP | Hiroshima University Press (Hiroshima, Japan) |