| Acronym | Definition |
|---|
| RAAS | Renin-Angiotensin-Aldosterone System |
| RAAS | Resort Accommodation and Sales |
| RAAS | Región Autónoma del Atlántico Sur |
| RAAS | Reporting As A Service |
| RAAS | Runway Awareness and Advisory System |
| RAAS | Russian Academy of Agricultural Sciences |
| RAAS | Regulatory Audit Archive System |
| RAAS | Remote Aerodrome Advisory Service (aviation telecommunications; Canada) |
| RAAS | Romanian Association for American Studies |
| RAAS | Remedial Action Assessment System |
| RAAS | Rare Antibody Antigen Supply, Inc. (Agoura Hills, CA) |
| RAAS | Reference Ambient Air Sampler |
| RAAS | Remote Access Aviation System |
| RAAS | Report Analysis and Archive System (Domestic Nuclear Detection Office) |
| RAAS | Robotic Armored Assault System |
| RAAS | Regional Area Augmentation System |
| RAAS | Royal Alexandra and Albert School (UK) |
| RAAS | Raytheon Airline Aviation Services LLC |
| RAAS | Risk Assessment and Application System |
| RAAS | Readiness-as-a-Service |
| RAAS | right ascension of the apparent sun |
| RAAS | Research Analyst Assessment Specialist |
| RAAS | RISC Advanced Architecture Server |
| RAAS | Resource as a Solution (Canada) |
| RAAS | Recruitment as a Service |