<p>If people take 18.02 in fall semester, they will prob take 18.03 spring (I plan on taking 18.01A/18.02A IAP fall semester to brush up on 18.01 before launching into multi as I took the BC test in junior not senior year, and spring I will take 18.03) as 18.03 is a pre-requisite for just about every major.</p>