Center for Human Modeling and Simulation - University of Pennsylvania (RCD)
Hammer Makers' Society - A union - British
Hanford Medical Scheduling (SAUS)
Hanford Meteorological Station (SAUS)
Hanford Meteorological System (SAUS)
Hanford Meteorology Surveys - Nuclear energy (NRCH)
Hardened Memory System
Harmonic Multiplier Source
Harvard Medical School
Harvard University Medical School, Countway Library of Medicine, Boston, MA - OCLC symbol (OCLC)
Hazard Mapping System - An interactive processing system (SSEC)
Hazardous Materials Safety - RSPA (TAG)
Hazardous Materials System (SAUS)
Hazardous Materials Systems - A publication (EAAP)
Hazards Monitoring System - NASA (KSC)
Health Mobilization Series
Heavy Materiel Supply Units - Military
Heavy-Media Separation - Mining engineering (IAA)
Heavy Metal Scraps (RIMS)
Helmet-Mounted Sight - Aviation
Helmet Mounted Sonar (SAUS)
Hemin Storage
Hemus Air - Bulgaria - ICAO designator (FAAC)
Hestair Management Services Ltd. (SAUO)
Heterodyne Millimeter-Wave Spectrometer (SAUS)
Hexagonal Mesoporous Silica - Inorganic chemistry
Hexose Monophospate Shunt (PDAA)
Hierarchical Memory Storage - Computer science
High-altitude Multispectral Sounder (SAUS)
High Melt Strength - Plastic moldings
High Performance Management System (SAUS)
Highway Mobile Source - Environmental Protection Agency (GFGA)
His - or Her Majesty's Service
His - or Her Majesty's Ship
His - or Her Majesty's Steamer
Historical Metallurgy Society - British (EAIO)
History Memory System (MCD)
History of Mine Safety (SAUO)
Home Marketing Services (SAUS)
Home Mission Society (SAUO)
Home Missions Society (SAUO)
Honeywell's Manufacturing System - Honeywell Information Systems Ltd. - Software package (NCC)
Hospital Management System (SAUS)
Hospital Marketing Services, Inc. - Commercial firm (DAVI)
Host Marriott Services Corp. - NYSE symbol (SAG)
Hours, Minutes, Seconds
Hughes Materials Specification (ACAE)
Hull Monitoring System (PDAA)
Hull-Mounted Set (SAUS)
Humility of Mary Service (EA)
Hungarian Meteorological Service (SAUS)
Hydrogen Mitigation System (SAUS)
Hypothetical Mean Strain (SAUS)
International Marine, Inglewood, CA - Manufacturer code for watercraft hull identification number (USCG)
Southern Qiandong Hmong - Language code (ETLW)
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