The names - Mu, Speed, Vigor, Vector indicates the frame style, and followed by the P, D, S to indicate the component quality, and then usually a number to indicate the speeds. There has been some variations here and there, so not all products have the same designations such as the Visc, Formula to name a couple, and some special designations such as EX, SL, Rohloff which sort of indicates custom upscale component groupings, but usually still associated with a particular frame style.

Tern uses a similar method - Verge, Link, Swoop, Eclipse, Castro, Joe - indicating frame style, followed by component quality designator and number of speeds.