| HTO | East Hampton, New York USA 
| Others |
| HTO | Habitual Traffic Offender
| Others |
| HTO | Habitual Traffic Offenders
| Others |
| HTO | Habitual Traffic Ofiender
| Others |
| HTO | Handbook of Texas Online
| Others |
| HTO | Hash To Object
| Others |
| HTO | Haul Truck Operator
| Others |
| HTO | Haystack Tagging Ontology
| Others |
| HTO | Head To Orlando
| Others |
| HTO | Health Technology Organisation
| Others |
| HTO | Heavy Terrain Outback
| Others |
| HTO | Hellenic Telecommunications
| Others |
| HTO | Hellenic Telecommunications Organization
| Others |
| HTO | Herald Times Online
| Others |
| HTO | HeraldTimesOnline Today On
| Others |
| HTO | Hesperian transition outflow
| Others |
| HTO | Hexadecyl Tetradecenoyl Octadecanoate
| Others |
| HTO | Hierarchical tagged objec
| Others |
| HTO | Hierarchical Tagged Object
| Others |
| HTO | Hierarchical Tagged Objects
| Others |
| HTO | High Temperature Oil
| Others |
| HTO | High Temperature Oxidation
| Others |
| HTO | High Temperature Oxide
| Others |
| HTO | High Tibial Osteotomy
| Others |
| HTO | High-Temperature Oxidation
| Others |
| HTO | Highway Transportation Officer
| Others |
| HTO | Hoffman Test for Organicity
| Others |
| HTO | Home Teams Online
| Others |
| HTO | Horizontal Take Off
| Others |
| HTO | Hospital Transfer Order
| Others |
| HTO | Hostile Take Over
| Others |
| HTO | Hostile TakeOver
| Others |
| HTO | Housework Time Overlap
| Others |
| HTO | How to Order
| Others |
| HTO | Hudson Trail Outfitters
| Others |
| HTO | Hustlers Taken Over
| Others |
| HTO | Hustlers Takin Over
| Others |
| HTO | Hydraulic Throw Out
| Others |
| HTO | Hydrogen Tritium Oxygen
| Others |