The purpose of the I-R zone is to provide an environment exclusively for and conducive to the development and protection of modern, large-scale research and specialized manufacturing organizations, all of a non-nuisance type. (Ord. 3153 § 2 (Exh. A), 2010; Ord. 1281 § 1, 1970; Ord. 1212 § 1, 1969; prior code § 33.512(A)).