ISR's

The Iterative Strength Ratings, a measure of team quality for NCAA Division I baseball, -- current, past, and notes.

RPI's

An accurate simulation of the Ratings Power Index, the official NCAA measure of team quality used by the tournament selection committee -- current, past, and notes.

SoS

Strength of Schedule information.

EFI

The External Factor Index, a measure of the non-baseball advantages that each program enjoys, such as weather and enrollment.

The College Baseball Ratings FAQ

The RPI Needs Report

A report on what each team that's still in range needs to do to reach differing RPI thresholds under simplified conditions.