| Acronym | Definition |
|---|
| RAIN | Resources and Information Network (South Africa) |
| RAIN | Receiver Autonomous Integrity Monitoring (global positioning systems) |
| RAIN | Radio and Internet Newsletter (trade publication) |
| RAIN | Records and Archives in the News |
| RAIN | RApid INnovation |
| RAIN | Redundant Array of Independent Nodes |
| RAIN | Regional Alliance for Information Networking |
| RAIN | Reliable Array of Independent Nodes |
| RAIN | Regional Access Information Network |
| RAIN | Rakai AIDS Information Network |
| RAIN | Redundant Array of Independent Netports (IEEE 802.1d Link Aggregation and Cisco Fast Etherchannel) |
| RAIN | Recognize, Avoid, Isolate, Notify |
| RAIN | Regional Agricultural Information Network of Eastern Africa |
| RAIN | Recruiting Automated Interim Network |