| Acronym | Definition |
|---|
| RALPH | Reentrant Algorithmic Language Processor with H |
| RALPH | Review of Arts, Literature, Philosophy and the Humanities (San Diego, CA) |
| RALPH | Rapidly Adapting Lateral Position Handler (automotive science) |
| RALPH | Royal Association for the Longevity and Preservation of the Honeymooners |
| RALPH | Rosetta @ Home Alpha Project (alpha version, Rosetta distributed computing program) |
| RALPH | Robotic Assisted Laparoscopic Prostatectomy Heroes (UK) |
| RALPH | Reciprocally Acting Lymphocyte Proliferation Helper |
| RALPH | Resource Allocation Planning Helper (NASA) |