If it's anything medical, then SL means sublingual(under the tongue) and TID means three times. So a patient would take their medication under the tongue three times a day.
Talent Identification
Sl
SL derives from the German "Sport Leicht" or "Sport Light" in English.
supreme luxury.
Sports light
Supreme luxury
Stainless Limited
Standard Luxury
Standard luxury
It might stand for Salt lake City but usually there is a t on the end.
It now stands for Sport Luxury, It used to stand for Special Limozine.
Standard luxury