What does Sil stand for?

Silesian (DIAR)

Silius Italicus - First century AD - Classical studies (OCD)

Silver Tax Division (Internal Revenue Bulletin) - A publication (DLA)

Silvester Godinho - Deceased, 1244 - Authority cited in pre-1607 legal work (DSA)

- The Silmarillion - A collection of J.R.R. Tolkien's works - Published posthumously by Christopher Tolkien

Apex Silver Mines - AMEX symbol (SPSG)

Apex Silver Mines, Ltd. - AMEX symbol (NASQ)

Ile a la Crosse Public Library, Saskatchewan - Library symbol - National Library of Canada (NLC)

Safety Information Letter (IEEE)

Safety Integrity Level (ACII)

Sao Hill - Tanzania - Airport symbol (AD)

Scanner Input Language

Schedule Interface Log

SCN - Stock Control Number Index and Log

Sea Island Air Ltd. - Canada - ICAO designator (FAAC)

Seaspan International - Federal Railroad Administration identification code

Selected Item List

Semiconductor Injector LASER

Sequence in Line - Automobile assembly

Seriously Ill List - Military

Service Information Letter

Set Indicators of the Left Half (SAA)

Shift Indicator Lamp (HAWK)

Shift Indicator Light - Automotive engineering

Silcorp Ltd. - Toronto Stock Exchange symbol

Sil Distributors - NCIC firearms make code (NCIC)

Silence (MSA)

Silent (NTCM)

Silhouette - NCIC car model code

Silicate

Silicone (SAUS)

Silicon Systems, Inc. - NYSE symbol (COMM)

Sillimanite - Mineralogy

Silurian - Period, era, or system - Geology

Silver (AAG)

Silver - NCIC item color code (NCIC)

Single in Line - Electronics (EECA)

Sister in Law (CHAT)

Slidel, LA - Location identifier - FAA (FAAL)

Smart Integral Linearizer - Instrumentation

Smithsonian Institution Information Leaflets

Smithsonian Institution Libraries

SNOBOL Implementation Language Reimplemented - 1974 - Computer science (CSR)

Societas Internationalis Limnologiae Theoreticae et Applicae - International Association of Theoretical and Applied Limnology

Societe Internationale de la Lepre - International Leprosy Association

Society for Individual Liberty (EA)

Society for International Law (SAUS)

Solid Immersion Lens - Computer science

Soluble Interleukin - Medicine (EDAA)

Sound Intensity Level

Sound Interference Level - NASA (NASA)

Special Interest Launch - Military (AFIT)

Specific Individual Licence - Importing - British (DS)

Speech Interference Level

Squamous Intraepithelial Lesion - Medicine

Steam Isolation Line (IEEE)

Store Interface Link

Summer Institute of Linguistics

Supply Information Letter (MCD)

Support Items List (MCD)

Surge Impedance Loading

System Implementation Language - Computer science

System Information Library - Computer science (CIST)

System Integration Laboratory (SAUS)

System Interface Logic (ACAE)

Systems Implementation Language (SAUS)

Systems Integration Laboratory - NASA (MCD)

Tumulung Sisaala - Language code (ETLW)