SIL
- Apex Silver Mines
- Association for Standardisation of Automation and Measuring Systems
- CIL (disambiguation)
- Narasingha Sil
- Olav Basoski
- SIL International
- SIL Open Font License
- SIL code
- STIL
- Safety Integrity Level
- Scooters India Limited
- Servis Industries Limited
- Sierra Leone
- Sil (Doctor Who)
- Sil (river)
- Sil (village)
- Sil Austin
- Sil Campusano
- Sile (river)
- Silence-Lotto
- Sill (disambiguation)
- Sils (disambiguation)
- Silvio Dante
- Silvy De Bie
- Smithsonian Institution Libraries
- Societas Internationalis Limnologiae
- Society for Individual Liberty
- Solid immersion lens
- South Island line
- Species (film)
- Speech Interference Level
- Squamous intraepithelial lesion
- Standard Interchange Language
- Surge impedance loading
- Tumulung Sisaala
- Urban Dance Squad