SL
- sl — (s) Slovene language (ISO 639-1 code)
- SL
- (s) Sierra Leone (ISO 3166 and FIPS 10-4 country code digram)
- (i) Start Line
- SLA
- (i) Service Level Agreement
- Symbionese Liberation Army
- SLAA — (i) Sex and Love Addicts Anonymous
- SLAC — (a) Stanford Linear Accelerator Center
- SLAN — (i) sine loco, anno, nomine (Latin, “without place, year, or name”)
- SLAPP — (a) Strategic lawsuit against public participation
- SLB — (s) Solomon Islands (ISO 3166 trigram)
- SLBM — (i) Sea/Submarine-Launched Ballistic Missile
- SLC — (i) Scan Line Corrector
- SLE — (s) Sierra Leone (ISO 3166 trigram)
- SLI/SLi
- (i/s) Scan-Line Interleave
- Scalable Link Interface
- SLIT — (p) SubLingual ImmunoTherapy
- slk — (s) Slovak language (ISO 639-2 code)
- SLL — (s) Sierra Leone Leone (ISO 4217 currency code)
- SLO — (s) Slovenia (IOC trigram, but not FIFA or ISO 3166)
- SLOC
- (a) Sea Lines Of Communication
- Source Lines Of Code
- SLORC — (a) State Law and Order Restoration Council (of Burma)
- SLP
- (i) Sea Level Pressure
- (i) Super Long Play
- slph — (s) Standard litre per hour (air flow)
- slpm — (s) Standard litre per minute (air flow)
- slps — (s) Standard litre per second (air flow)
- SLR — (i) Single-Lens Reflex (camera)
- SLT
- (i) Single Lens Translucent
- (i) Speech and language therapist
- (i) Solid Logic Technology (electronics)
- Swing Landing Trainer (paratroops)
- (i)Secondary lymphoid tissue
- slv — (s) Slovenian language (ISO 639-2 code)
- SLV — (s) El Salvador (ISO 3166 trigram)
Read more about this topic: List Of Acronyms And Initialisms: S