What does PAR stand for?

Pre-Assembled Rack

Protective Action Recommendation

Plant A Row

Photosynthetically Active Radiation

The electromagnetic energy in the 400 and 700 nm wavelength range.

Performance Average Rating

Parade

Parapet

A wall that subdivides spaces within any story of a building or room. The portion of a vertical wall of a building which extends above the roof line at the intersection of the wall and roof. A wall placed at the edge of a roof to prevent people from falling off. Or A low wall, located at the top of any sudden drop, such as at the top of the facade of a building. A low wall built along the edge of a roof bridge or other structure; the continuation of the main wall above the eaves level to form such a wall.

Policy Analysis and Review Committee

Program for Alcoholic Recovery

Precision Approach Radar

Is a type of radar guidance system designed to provide lateral and vertical guidance to an aircraft pilot for landing, until the landing threshold is reached.