Similarity relations and BK-relational products

(BK)-relational products and their role in the analysis and synthesis of complex systems has been discussed by Bandler and Kohout in a series of papers. We show that BK-products preserve similarity of the relations in that if R1, R2, and S1, S2 are similar then R1*S1 and R2*S2 are also similar for any type * of BK-products. Applications of the results are discussed