The US Naval Research Laboratory is to upgrade and expand its Butterfly parallel processing system in a move that will give it the most powerful Butterfly to date, BBN Advanced Computer Inc reports from Cambridge, Massachusetts: the Navy’s $800,000 upgrade, will increase performance to 320 MIPS and hike its memory to 512Mb, doubling the number of Butterfly nodes to 128; the machine is to be used inter alia to simulate expert systems for Navy battle management, and to simulate communication networks or network configuration optimisation.