IBM Rochester is the facility of IBM in Rochester, Minnesota, not to be confused with the IBM Global Services facility in Rochester, Minnesota. The initial structure was designed by Eero Saarinen, who clad the structure in blue panels of varying hues after being inspired by the Minnesota sky, as well as IBM's nickname of "Big Blue". These features and the facility's size has earned it the nickname "The Big Blue Zoo" from employees.
The building was first dedicated in 1958, but has been expanded considerably since then. The mile-long facility is best known as the plant that produced the AS/400 computer system, which later was rebranded as the iSeries and now System i. RS/6000, now System p, and hard disk development has also occurred at the site at points in the past. Actually, PureSystems are mainly assembled at this site.
Hitachi Global Storage Technologies, although having been spun off from IBM Storage Technology, remains on-site, leasing otherwise unused space from IBM. Along with the Mayo Clinic, the IBM plant is one of the biggest employers in the Rochester area, reportedly numbering around 5,000 in 2002.
The AS/400 division at the plant received the Malcolm Baldrige National Quality Award in 1990. In November 2004, the facility claimed the top spot in the TOP500 list of fast supercomputers with a prototype Blue Gene/L system containing 32,768 processors. It clocked in at 70.72 teraflops. The manufacturing output of the site is so great that if it were a separate company, it would be the world's third-largest computer producer.