Hausa - Language symbol (ETLW)
H-Boat USA, Barnstable, MA - Manufacturer code for watercraft hull identification number (USCG)
Heads Up, Ace (SAUS)
Heard, Understood, Acknowledged - Chat lingo
Highway Users Association (SAUO)
Hockey Umpires' Association - British
Housing and Urban Affairs (SAUO)
Huancayo - Peru - Seismograph station code, US Geological Survey (SEIS)
Human Urinary Albumin - Clinical chemistry
Humber Aviation Ltd. - British - ICAO designator (FAAC)
Huntsville, AL - Location identifier - FAA (FAAL)
Hurricane Watch - Telecommunications (OTD)
Hydrologic Unit Area (SAUO)