| Acronym | Definition |
|---|
| MHS | Military Health System (Department of Defense) |
| MHS | Massachusetts Historical Society |
| MHS | Massachusetts Horticultural Society |
| MHS | Memorial High School (Sydney Mines, Nova Scotia) |
| MHS | Mckinney High School (Mckinney, Texas) |
| MHS | Mental Health Services |
| MHS | Minnesota Historical Society |
| MHS | Missouri Historical Society |
| MHS | Manitoba Historical Society |
| MHS | Memorial High School (Houston, Texas) |
| MHS | Musical Heritage Society |
| MHS | Milton Hershey School |
| MHS | Michigan Humane Society |
| MHS | Monroe High School |
| MHS | Medford High School (Massachusetts) |
| MHS | Middle/High School |
| MHS | Manchester High School |
| MHS | Milford High School |
| MHS | Melbourne High School |
| MHS | Microwave Humidity Sounder |
| MHS | Madison High School |
| MHS | Mercy High School (Farmington Hills, MI) |
| MHS | Meridian High School (Sanford, Michigan) |
| MHS | Midland High School (Midland, Texas) |
| MHS | Murray High School |
| MHS | Material Handling System |
| MHS | Montgomery High School (various locations) |
| MHS | Midland High School (Midland, MI) |
| MHS | Milton High School (various locations) |
| MHS | Mayfield High School (California) |
| MHS | Miami High School |
| MHS | Mooresville High School (Mooresville, Indiana) |
| MHS | Martinsville High School (Martinsville, IN) |
| MHS | Masters of Health Science |
| MHS | Miramonte High School (California) |
| MHS | Susceptibility to Malignant Hyperthermia |
| MHS | Magnolia High School (various states) |
| MHS | McLean High School (McLean, VA) |
| MHS | Melrose High School (Massachusetts) |
| MHS | Morton High School (Morton, IL) |
| MHS | Malignant Hyperthermia Syndrome (Porcine Stress Syndrome) |
| MHS | Medina High School (Medina, Ohio) |
| MHS | Mamaroneck High School (Mamaroneck, NY) |
| MHS | Muscatine High School (Muscatine, Iowa) |
| MHS | Mission High School |
| MHS | Monrovia High School (Monrovia, IN) |
| MHS | Managed Hosting Services |
| MHS | Menchville High School (Virginia) |
| MHS | Manzano High School (Albuquerque, New Mexico) |
| MHS | Malden High School (Missouri) |
| MHS | McIntosh High School (Georgia) |
| MHS | Mandeville High School (Mandeville, Louisiana) |
| MHS | Marcus High School (Flower Mound, Texas) |
| MHS | Mphasis Healthcare Solutions (Phoenix, Arizona) |
| MHS | Moline High School (Moline, Illinois, USA) |
| MHS | Micro-Nanomechatronics and Human Science (International Symposium) |
| MHS | Millburn High School (Millburn, NJ) |
| MHS | Medical Health Services |
| MHS | Marlboro High School |
| MHS | Mail Handling System |
| MHS | Mark-Houwink-Sakurada (developers of a mathematical relationship used in polymer analysis) |
| MHS | Mustang High School |
| MHS | Mineola High School |
| MHS | Metabolite:H+ Symporter |
| MHS | Molalla High School (Oregon) |
| MHS | Mariner High School (Everett, WA) |
| MHS | Mammoth Hot Springs |
| MHS | McDowell High School (various locations) |
| MHS | McNeil High School (Austin, Texas) |
| MHS | Martinsburg High School (West Virginia) |
| MHS | Medway High School (Arva, Ontario, Canada) |
| MHS | Massachusetts Humane Society |
| MHS | Maury High School (Virginia) |
| MHS | Moncton High School |
| MHS | Man High School (Man, West Virginia) |
| MHS | Moorhead High School (Minnesota) |
| MHS | Mennonite Health Services (Goshen, IN) |
| MHS | Ministry of Human Settlements (Philippines) |
| MHS | Montague High School (Montague, Michigan) |
| MHS | Middleburg High School (USA) |
| MHS | Magruder High School (Rockville, Maryland) |
| MHS | Masuk High School (Monroe, CT, USA) |
| MHS | McDonough High School |
| MHS | Meadowcreek High School (Norcross, Georgia) |
| MHS | Marylebone High Street |
| MHS | Merivale High School (Ottawa, Ontario) |
| MHS | Methacton High School (Norristown, Pennsylvania) |
| MHS | McGavock High School |
| MHS | Manalapan High School |
| MHS | Mauston High School |
| MHS | Madill High School (Madill, OK) |
| MHS | Manvel High School (Manvel, Texas) |
| MHS | Maxwell High School |
| MHS | McKean High School (Wilmington, Delaware) |
| MHS | Millwood High School (USA) |
| MHS | Mapleton High School (USA) |
| MHS | Merewether High School (Broadmeadow, NSW, Australia) |
| MHS | Minnie Howard School (Alexandria, Virginia) |
| MHS | Macintyre High School (Inverell, NSW, Australia) |
| MHS | Magrath High School (Magrath, Alberta, Canada) |
| MHS | Mountfitchet High School (Stansted Mountfitchet, UK) |
| MHS | Moosehead Sled (MUD) |
| MHS | Message Handling Service/System |
| MHS | Montini High School (Lombard, IL) |
| MHS | Montello High School (Montello, Wisconsin) |
| MHS | Monterey Highlands School |
| MHS | Mine Handling System |
| MHS | Mahbert High School |
| MHS | Marinehospitaal Soerabaja (Dutch) |
| MHS | Manufacturing Handling Service |
| MHS | Morganza High School (Louisiana) |
| MHS | Mastering High Standards |