454 MHS definitions

Message Handling System 
Military Health System 
Microwave Humidity Sounder 
Message Handling Systems 
Message Handling Service 
Master of Health Science 
Master of Health Sciences 
Message Handling Services 
Madera High School 
Magnolia High School 
major histocompatibility system 
Make haste slowly 
Malibu High School 
malignant hyperthermia syndrome 
Mammoth High School 
Mandarin High School 
Manteca High School 
Maricopa High School 
Marina High School 
Marysville High School 
Material Handling System 
Maxwell High School 
Mayfair High School 
Mcfarland High School 
Mckinleyville High School 
Mclane High School 
Meat Hygiene Service 
Mendocino High School 
Mendota High School 
Merced High School