What does MHR stand for?

Magnum Hunter Resources - AMEX symbol (SPSG)

Major Histocompatibility Region - Immunology

Major Homology Region - Biochemistry

Malignant Hyperthermia Resistance - Medicine (DMAA)

Man-Hour

Man Hours Required - Military technology (DDF)

Marine Enterprises, Pittsburg, CA - Manufacturer code for watercraft hull identification number (USCG)

Master of Human Resources

Maternal Heart Rate (MELL)

Maximal Heart Rate (SAUS)

Maximum Heart Rate

McGraw-Hill Ryerson Ltd. - Toronto Stock Exchange symbol

Measurement Handicap Rule - Sailing

Medical Humanities Review - A publication (BRI)

Mehri - Language symbol (ETLW)

Member of the House of Representatives

Methemoglobin Reductase - Hematology and laboratory (DAVI)

Microwave Hologram RADAR

Mile High Radar (SAUS)

Miniature Helium Refrigerator

Missile Hazard Report (AFM)

Mount Hamilton Road - California - Seismograph station code, US Geological Survey (SEIS)

Sacramento, CA - Location identifier - FAA (FAAL)

United States Army Military History Institute, Carlisle Barracks, PA - OCLC symbol (OCLC)