The term tangible personal property includes all personal property possessing a physical existence, excluding money. The term tangible personal property also includes trade fixtures, which means machinery and equipment, regardless of the degree of attachment to real property, used directly in commercial, manufacturing, or processing activities conducted on real property, regardless of whether the real property is owned or leased, and all depreciable tangible personal property described in subsection (9) of section 77-202 used in the generation of electricity using wind, solar, biomass, or landfill gas as the fuel source. The term intangible personal property includes all other personal property, including money.