What is the difference between a concentration, subplan, and track?

Concentrations are transcripted meaning that when a student earns their degree they also receive a concentration that prints on the diploma and transcript. A track (pathway, emphasis, option) provides students with a specific set of coursework that aligns with their interests, but are not reflected on the diploma or transcript. A subplan is any subprogram (track or concentration) that a student declares in pursuit of their degree. Check out this CSU document which describes the three options and provides additional information about requirements for each.