Industrial purposes include: heavy and light manufacturing buildings; research and development parks; factory-office multiuse property; factory-warehouse multiuse property; and industrial parks.
Industrial buildings are often a warehouse or other large, unfinished space that can be used strictly as a warehouse or for purely industrial purposes. However, many industrial spaces are converted to serve as more traditional office space, or as a combination of storage/industrial/business use. Industrial park spaces are also now being used by many retail businesses.
To attract a wide variety of businesses, many industrial parks have now become more upscale so that on the surface they can be hard to distinguish from retail and business parks.