• Air Memphis
  Air Memphis
  Air Memphis is a charter airline based in Cairo, Egypt. Its main base is Cairo International Airport..-History:The airline was established in August 1995 and started operations in March 1996. It had 530 employees as of March 2010..-Fleet:...
  
  , and Egyptian airline that uses the ICAO-Code MHS
• Malignant hyperthermia syndrome
  Malignant hyperthermia
  Malignant hyperthermia or malignant hyperpyrexia is a rare life-threatening condition that is usually triggered by exposure to certain drugs used for general anesthesia; specifically, the volatile anesthetic agents and the neuromuscular blocking agent, succinylcholine...
  
  , a condition that is triggered by exposure to drugs used for general anaesthesia
• Master of Health Science
  Master of Health Science
  The Master of Health Science degree is a specialized master’s degree. Depending on the department and specific area of study, the MHS degree provides opportunities for advanced study and research or prepares individuals to begin or advance their careers as public health professionals...
  
  , a graduate degree program
• Meadowhall Interchange
  Meadowhall Interchange
  Meadowhall Interchange to the north of Sheffield, South Yorkshire, England is a railway station on the Midland Main Line, a Sheffield Supertram stop, and bus station. It is close to junction 34 on the M1, and serves Meadowhall Shopping Centre...
  
  , a railway station in England that uses the National Rail station code MHS
• RAF Menwith Hill
  RAF Menwith Hill
  RAF Menwith Hill is a Royal Air Force station near Harrogate, North Yorkshire which provides communications and intelligence support services to the United Kingdom and the United States of America...
  
  , also known as Menwith Hill Station (MHS), a Royal Air Force
  Royal Air Force
  The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...
  
   station in Harrogate, North Yorkshire
• Message Handling System, a past Novell email protocol
• Michigan Humane Society
  Michigan Humane Society
  The Michigan Humane Society is a private, non-profit organization providing animal welfare and sheltering services to the metropolitan Detroit area...
  
  , an organization providing animal welfare and sheltering services
• Microwave Humidity Sounder
  Microwave humidity sounder
  The Microwave Humidity Sounder is an instrument launched on NOAA's POES satellite series starting with NOAA-18 launched in May 2005 and European Space Agency's MetOp series starting with MetOp-A launched in October 2006. It is a five-channel passive microwave radiometer, with channels from 89 to...
  
  , an Earth-observing instrument on NOAA POES and EUMETSAT MetOp satellites
• Military Health System
  Military Health System
  The Military Health System is the enterprise within the United States Department of Defense responsible for providing health care to active duty and retired U.S. Military personnel and their dependents...
  
  , the United States Department of Defense health care system
• Museum of the History of Science, a museum in Oxford, England
• Mean Hamster Software
  Mean Hamster Software
  Mean Hamster Software, Inc. is a video game developer founded by John Swiderski in 1985. Mean Hamster Software created several games for the Atari 5200 from 1999-2004. They then created Myst for Windows Mobile in 2005, and after the release of Riven: The Sequel to Myst for Pocket PC in 2006, Mean...
  
  , a video game developer based in Deer Park, Washington, USA
• Mull Historical Society
  Mull Historical Society
  Mull Historical Society is a name under which the singer-songwriter and multi-instrumentalist Colin MacIntyre performs. After a period of recording and performing under his own name for several years, MacIntyre's 2011 album 'City Awakenings' will be a Mull Historical Society release...
  
  , a Scottish indie rock band
• Musical Heritage Society, US classical music label

Schools

• Matthew Humberstone School
  Matthew Humberstone School
  Matthew Humberstone Church of England School, often shortened to MHS or, more affectionately, Matty, was a comprehensive school in Cleethorpes, North East Lincolnshire, with a Church of England tradition...
  
  , Cleethorpes, England
• Mill Hill School
  Mill Hill School
  Mill Hill School, in Mill Hill, London, is a coeducational independent school for boarding and day pupils aged 13–18. It is a member of the Headmasters' and Headmistresses' Conference, an organisation of public schools in the United Kingdom....
  
  , London, England
• MHS (high schools)
  MHS (high schools)
  -In multiple locations:*Madison High School *Manchester High School *Marietta High School *Marquette High School *Mayfield High School *Mayville High School...