The design of the Zumwalt solves that problem by using off-the-shelf hardware—mostly IBM blade servers running Red Hat Linux—and putting it in a ruggedized server room. Those ruggedized server rooms are called Electronic Modular Enclosures (EMEs), sixteen self-contained, mini data centers built by Raytheon.

Measuring 35 feet long, 8 feet high, and 12 feet wide, the 16 EMEs have more than 235 equipment cabinets (racks) in total. The EMEs were all configured and pre-tested before being shipped to Bath, Maine, to be installed aboard the Zumwalt.

via The Navy’s newest warship is powered by Linux | Ars Technica.

Putting all of the pieces together is a collection of middleware running on those IBM blade servers. Many of the shipboard systems use a commercial publish/subscribe middleware platform to send updates to operator consoles. But for other systems that need to be more tightly coupled (like, for example, missile launch commands), the Navy has specified the use of the Common Object Request Broker Architecture (CORBA)—the military’s favorite mission-critical middleware model. (The software for the Joint Tactical Radio System’s software-defined radios was also developed using CORBA.)