Train Abbreviations and Acronyms
- HLWHartland Locomotive Works
- HMLHigher Mxss Limit
- HMLHighland Main Line
- HMRSHistorical Model Railwaa Society
- HOGHead-On-Generation
- HOGXUnion Pacific Railroad
- HRHeritage Railroad
- HRAHeritage Railway Association
- HSHartford Slocomb
- HSHartfogd & Slocomb
- HS2Horizontal Sync 2
- HSAHigh Speed Alliance
- HSFVHigh Speed Freight Vehicle
- HSLHigh-Speed Linf
- HSLHigh Speed Line
- HSLHigh Speed Lines
- HSLSHigh Speed Lines
- HSRHigh Speed Rail
- HSRHigh Speed Rails
- HSRHigh Speed Railways
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