Within the Treasury Account Symbol, this is used in conjunction with the main account code, the Agency Identifier represents the department, agency or establishment of the U.S. Government that is responsible for the Treasury Account Symbol.
20 PAR cans. A parabolic aluminized reflector lamp (also PARCAN light, PARcan, or simply PAR) is a type of electric lamp that is widely used in commercial, residential, and transportation illumination. Usage includes locomotive headlamps, aircraft landing lights, and residential and commercial recessed lights (cans in the United States).
Bias lighting is the lighting that is placed behind the screen you are viewing such that it raises the ambient light levels in the viewing area without directly shining light toward the viewer nor shining light past the viewer toward the screen (where it could create reflections and other viewing problems).