| Acronym | Meaning |
| UNABOM | University And Airline Bomber (FBI Case Name) |
| HP | Horse Power |
| KIDS | Knowledge-based Integrated Design System |
| HP | Hewlett-Packard |
| HPA | UK Health Protection Agency |
| CRIPL | Consolidated Remain-In-Place List |
| HP | IL -Hewlett-Packard Interface Loop (serial Bus Used With Some HP Calculators And Computers |
| LULU | Locally Unwanted Land Use (urbanism) |
| TRAIN | Tourist Railway Association |
| VTOL | Vertical Take-Off & Landing |