A - All mountain/all purpose

AX - Stöckli All mountain Cross
AR - Stöckli All mountain Race
BMX - Kästle Big Mountain Cross
C - Carving/Carver. Short to medium radius turn, narrow under foot.

DH - DownHill (race)
DX - Kästle ________ Cross
FIS - FIS Alpine. The ski has dimensions to whatever year world cup specs.
FX - Kästle ________ Cross
GS - Giant Slalom (race)

HT - ________ ________
KX - Kästle ________ Cross
LT - Rossi Long Turn
LX - Kästle Light Cross
MT - Rossi Multi Turn
MX - Kästle Mountain Cross or Mountain Cross

R - Race-ish. Sporty, narrow under foot.
RC - Rennen Carven, Race Carving
RD - Race Department
RS - Riesen Slalom (i.e., GS)
RX - Kästle Race Cross

S - Slalom, Sporty, Short turns/radius and narrow under foot, short in length.
SC - Stöckli Sport Carve, or Slalom Carve
SG - Super G (race)
SL - Slalom (race)
ST - Rossi, Atomic Short Turn
SX - Stöckli Ski Cross, Atomic Skier Cross

T - marketing needed another letter; may stand for "ish" or "ski"
Ti - (or Titanium) - there is titanal in the skis (not Titanium)
TX - Kästle's Touring Cross; also Telemark Cross
X - marketing needed another letter; may stand for "ish" or "ski" or construction
WC - World Cup