| TRAIN | Tourist Railway Association, Inc. | 旅游铁路协会。 |
| TRAIN | TrainingFinder Real-Time Affiliate Integrated Network (Public Health Foundation) | TrainingFinder实时联盟综合网络（公共卫生基金会） |
| TRAIN | Transportation Assessment and Integration | 运输评估和整合 |
| TRAIN | TeleRail Automated Information Network | TeleRail自动化信息网络 |
| TRAIN | Training Records and Information Network | 培训记录和信息网络 |
| TRAIN | Training Resource And Information Network | 培训资源和信息网络 |