<p>In the Berkeley schedule, LAB, SEM, TUT, FLD, GRP, and IND can also refer to primary sessions of a given course, although some of these are not traditional classes (SEM and perhaps GRP are probably closest to traditional classes).</p>
<p>LAB = may be a course that only has lab, although most are labs associated with a lecture that is the primary session
SEM = seminar (often numbered 24, 39, or 84)
TUT = tutorial
FLD = field study (usually numbered 97 or 197)
GRP = group study (usually numbered 98 or 198)
IND = independent study (usually numbered 99 or 199)</p>
<p>Actually, what you probably want to count is the number of P before the course number in the PDF to pick up the primary sessions.</p>