| HBO | Hardly Been On 
| Others |
| HBO | Hartung-Boothroyd Observatory
| Others |
| HBO | Hate Bong Organization
| Others |
| HBO | Heating Boiler Oniy
| Others |
| HBO | Heavy Broadcast Overkill
| Others |
| HBO | Hebrew Box Office
| Others |
| HBO | Hells Box Office
| Others |
| HBO | Help a Brother Out
| Others |
| HBO | Henry Bruseles Office
| Others |
| HBO | Hey Baby, Ouch
| Others |
| HBO | Hey Beastmaster's On
| Others |
| HBO | Hey Beastmasters On
| Others |
| HBO | Hey, Bend Over
| Others |
| HBO | Hipparchus Binary Object
| Others |
| HBO | Hits Bangers Only
| Others |
| HBO | Hoger Beroeps Onderwijs
| Others |
| HBO | Hollywood Beaten Out
| Others |
| HBO | Hollywood Bowl Orchestra
| Others |
| HBO | Hollywood Business Orchestra
| Others |
| HBO | Home Bought Order
| Others |
| HBO | Home Box Office
| Others |
| HBO | Home Boys Organization
| Others |
| HBO | Honey Bunches of Oats
| Others |
| HBO | Horribly Bad Owners
| Others |
| HBO | Horrific Body Odor
| Others |
| HBO | Horrifically Bad Organization
| Others |
| HBO | Horses Bonin Ooh
| Others |
| HBO | Hot B***es Only
| Others |
| HBO | How Bout Off
| Others |
| HBO | Howard B. Owens Science Center, Lanham, Maryland
| Others |
| HBO | Human Body Odor
| Others |
| HBO | Humboldt, Nebraska USA
| Others |
| HBO | HyperBaric Oxygen
| Others |
| HBO | Hyperbaric Oxygenation
| Others |