The following are --

The following are examples of the prior art.
US Pat. 5765153

(The following are trademarks of International Business Machines Corporation: IBM, AS/400, OS/400, PS/2, OS/2, RISC System/6000, AIX).
US Pat. 6092096

The following are examples of well-known database models: the hierarchical model, the network model, and the relational model.
US Pat. 5890160