Hope this means you win a bet or something...
O = Opposed Cylinder
IO = Fuel Injected, Opposed Cylinder
TSIO = Turbo System, Fuel Injected, Opposed Cylinder
LTSIO = Left-hand Rotation, Turbo System, Fuel Injected, Opposed Cylinder
GTSIO = Geared, Turbo System, Fuel Injected, Opposed Cylinder
Dave