What does HOH stand for?

Dublin Sales Co., Dublin, GA - Manufacturer code for watercraft hull identification number (USCG)

Hard of Hearing (MAE)

HDSL Overhead Bit Handling (SAUS)

Head of Household - IRS

Heard on the Hill - US Congress

Help Our Headaches Group - Australia

Hereford Otter Hounds

High-Degree Helioseismometer

Hobyot - Language code (ETLW)

Hohenheim - Federal Republic of Germany - Seismograph station code, US Geological Survey - Closed (SEIS)

Holland & Holland - NCIC firearms make code (NCIC)

Hydrogen-Oxygen-Hydrogen - Water (HGAA)