Any tangible property owned and used for your business. This includes all machinery, fixtures, office furniture and equipment is considered Business Personal Property. In general, business personal property is all property owned or leased by a business except licensed vehicles, business inventory, intangible assets or application software.

Source / http://www.sfassessor.org/index.aspx?page=42

A "use" in city planning refers to the way a building or piece of land is designated to be used. For example, a piece of land may be designated as residential, meaning it can only be "used" as a home. A Conditional Use (CU) is a type of land use that is not principally permitted in a particular Zoning District. Conditional Uses require a Planning Commission hearing in order to determine if the proposed use is necessary and desirable to the neighborhood, whether it may potentially have a negative impact on the surrounding neighborhood, and whether the use complies with the San Francisco General Plan.

Source / https://sfplanning.org/