| RAIN | RApid INnovation | RApid创新 |
| RAIN | Rainforest Cafe, Inc. | 雨林咖啡公司。 |
| RAIN | Rakai AIDS Information Network | 拉凯艾滋病信息网 |
| RAIN | Rescuing Animals In Need | 救助有需要的动物 |
| RAIN | Regional Access Information Network | 区域访问信息网络 |
| RAIN | Redundant Array of Independent Nodes | 独立节点冗余阵列 |
| RAIN | Religious Alliance In Nevada | 内华达州宗教联盟 |
| RAIN | Recognize, Avoid, Isolate, Notify | 识别、避免、隔离、通知 |
| RAIN | Redundant Array Of Inexpensive Nodes | 廉价节点的冗余阵列 |
| RAIN | Redundant Array Of Independent Networks | 独立网络冗余阵列 |
| RAIN | Reliable Array of Independent Nodes | 独立节点的可靠阵列 |
| RAIN | Registration And Academic Information Network | 注册和学术信息网络 |
| RAIN | Redundant Array of Independent Netports (IEEE 802.1d Link Aggregation and Cisco Fast Etherchannel) | 独立网络端口冗余阵列（IEEE 802.1d链路聚合和Cisco快速以太网信道） |
| RAIN | Recruiting Automated Interim Network | 招聘自动化临时网络 |
| RAIN | Referral And Information Network | 推荐和信息网络 |
| RAIN | Riverdweller's Aid Innercity Network | Riverdweller的援助Innercity网络 |
| RAIN | Regional Agricultural Information Network of Eastern Africa | 东非区域农业信息网 |
| RAIN | Regional Alliance for Information Networking | 信息网络区域联盟 |
| RAIN | Run Around In Nachos | 在Nachos中四处奔跑 |
| RAIN | Regional Aids Interfaith Network | 区域艾滋病跨信仰网络 |