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.
Pepsi Center was constructed as part of a large six-year sporting venue upgrade in Denver along with Coors Field, home of the Colorado Rockies, and Sports Authority Field at Mile High (formerly Invesco Field at Mile High), home of the Denver Broncos. The complex was constructed to be readily accessible.