RPM is the acronym used for revolutions per minute. It measures the number of revolutions completed in one minute around a fixed axis, giving the speed of a mechanical component. It is commonly used to describe the performance of automobile engines.
Like most ballparks built from the 1990s onward, Safeco Field is a 'retro-modern' style ballpark that incorporates many of the features of ballparks built in the 1950s and earlier with modern amenities.
In January 2006, Microsoft announced the purchase of Safeco's Redmond campus. (Formerly one of Redmond's major employers, Safeco began consolidating its offices in Seattle's University District at the Safeco Tower in 2005.).