What does HAAP stand for?

Hawthorne Army Ammunition Plant (MCD)

Heavy Anti-Armor Projectile (SAUS)

High Air Pollution Potential

High-Altitude Aerial Photograph (CARB)

High-Altitude Air Pollution Program - FAA (MCD)

Holston Army Ammunition Plant

Homebase and Advanced Assignment Program (SAUO)

Home-Based Advanced Assignment Program - Military