I'm sure this is a stupid question but I see everyone referring to NBME exams as 'forms' (i.e. form 1, 3, 6...). Is everyone referring to the NBME comprehensive basic science exams found on the NBME self assessment page, or is there some other exam? These $45 1 time 200 question exams seem to be the only step 1 assessment on the site. Just wondering if i'm missing something...again sorry for asking a probably really obvious question. thanks.