This district is established to provide for a wide range of nonresidential and noncommercial uses such as general purpose office, professional and service, or administrative operations, research, testing and development. Among others, an objective of this district is to provide for a high intensity of use of considerable magnitude and located on a sufficient land area to accommodate the factors of employment, transportation and other land use considerations. The district shall permit uses and activities pertaining to product showrooms for the display, demonstration, training, selection and sale of goods not for delivery on the premises. Product installation, service, repair and maintenance is not permitted in the district. (Code 1995 § 48-14.00.)