There's been some discussion on here previously about what the definitions of mobile, manufactured, and moduler homes were... Well, I found this on a site & thought I'd share:

Manufactured Home: Built entirely in the factory under federal code administered by the Department of Housing and Urban Development (HUD), which went into effect June 15, 1976, has been upgraded numerous times. Covers single- or multi-section homes and includes transport to the site and installation. Regulations include: design & construction, strength & durability, transportability, fire resistance, energy efficiency & quality.

Mobile Home: The term mobile home used for homes built prior to June 15, 1976, when HUD code went into effect. Voluntary standards were previously in effect.

Modular Home: Built to state, local or regional code where home will be located. Multi-section units are transported to sites and installed. Modular sections are designed to be removed from the steel frame (also known as carrier) and placed onto a permanent foundation by a crane.