Acronyms & Abbreviations

The definition of OHS is:

Oñate High School

O'connell High School

O'Gorman High School

O'Neill High School

Oak Hill School

Oakcrest High School

Oakdale High School

Oakfield High School

Oakland High School

Oakley High School

Oakmont High School

Oakridge High School

Oakton High School

Oakville High School

Oakwood High School

Oberlin High School

Oberon High School

Obesity hypoventilation syndrome

Oblong High School

Occipital horn syndrome

Occupational Health & Safety

Occupational Health and Safety

Occupational Health Service

Occupational Health Services

Oceana High School

Oceanside High School

Ocoee High School

Oconomowoc High School

Oconto High School

October Household Survey

Octorara High School

Ocular histoplasmosis syndrome

Odem High School

Odessa High School

Off-Hook Service

Office of Handicapped Services

Office of Head Start

Office of Health and Safety

Office of Health Sciences

Office of Highway Safety

Office of Homeland Security

Ogallala High School

Ogden High School

Ogilvie High School

Ohatchee High School

Ohio Historical Society

Oil and Hazardous Substance

Oil-Hydraulic System

Okarche High School

Okeechobee High School

Okemos High School

Oklahoma Historical Society

Okmulgee High School

Okoboji High School

Ola High School

Olean High School

Olentangy High School

Olney High School

Olympia High School

Olympian High School

Olympic High School

Olympus High School

Omak High School

Omega High School

Omro High School

Onalaska High School

Oneida High School

Onekama High School

Oneonta High School

Ontario Health Survey

Ontario High School

Ontario Historical Society

Ontario Homeopathic Society

Ontario Humane Society

Ontario Hydro Services

Ooltewah High School

Oostburg High School

Opelika High School

Open heart surgery

Open High School

Open Hyperdocument System

Open-Hearth Steel

Opp High School

Oracle HTTP Server

Oral Health Section

Oral hydration solutions

Orange High School

Orangefield High School

Orara High School

Oregon High School

Oregon Historical Society

Orem High School

Orestimba High School

Orion High School

Orland High School

Orofino High School

Orono High School

Orosi High School

Oroville High School

Orrville High School

Ortega High School

Orting High School

Ortonville High School

Osage High School

Osawatomie High School

Osborn High School

Osborne High School

Osbourn High School

Osceola High School

Oscoda High School

Oskaloosa High School

Oslo Hypertension Study

Ossining High School

Oswego High School

Othello High School

Otsego High School

Ottawa High School

Ottoville High School

Ottumwa High School

Ovarian hyperstimulation

Ovarian hyperstimulation syndrome

Overbrook High School

Overfelt High School

Overhead hoist shuttle

Overhills High School

Overhydrated hereditary stomatocytosis

Overland High School

Overlea High School

Overton High School

Oviedo High School

Owasso High School

Owensboro High School

Owensville High School

Owosso High School

Oxford Handicap Scale

Oxford High School

Oxford Hip Score

Oxley High School

Oxnard High School

Ozark High School

Ozaukee High School

Ozen High School

Ozona High School