Instead of writing the categories entirely we abbreviate them. This is what all the abbreviations used mean.
OS = Open Skateboard
WO = Women
JR = Juniors
LU = Luge
SL = Street luge
CL = Classic luge
MJ = Micro-juniors
MA = Masters
tba = To Be Announced
Reg. st./Rego = Registration start
Nat. = Nationality
DSQ/DQ = Disqualified
DNS = Did Not Start (in a specific heat)
DNF = Did Not Finish
DNR = Did Not Race (when a rider has qualified but doesn't show for any heat, will be used next season).