| SIG | Isla Grande, Puerto Rico 
| Others |
| SIG | Safer Internet Group
| Others |
| SIG | Sands Investment Group
| Others |
| SIG | School Improvement Grant
| Others |
| SIG | School Improvement Grants
| Others |
| SIG | Schweizer Industrie Gesellschaft
| Others |
| SIG | Schweizerische Industrie Gesellschaft
| Others |
| SIG | Secure Internet Gateway
| Others |
| SIG | Senior Interdepartmental Group
| Others |
| SIG | Shared Instrument Grant
| Others |
| SIG | Shared Instrumentation Grant
| Others |
| SIG | Shared Interest Group
| Others |
| SIG | SIGnal
| Others |
| sig | signature
| Others |
| SIG | Signature file of Current program settings
| Others |
| SIG | Signature Innovation group
| Others |
| SIG | Single Input Graphics
| Others |
| SIG | Sistem Informatic de Gestiune
| Others |
| SIG | Sistemas de Informacion Geografica
| Others |
| SIG | So It Goes
| Others |
| SIG | Software Improvement Group
| Others |
| SIG | Solution Integration Group
| Others |
| SIG | Sorority Interest Group
| Others |
| SIG | Soul Inside Of Garry
| Others |
| SIG | Sourcing Industry Group
| Others |
| SIG | Sourcing Interests Group
| Others |
| SIG | Spatial Informatics Group
| Others |
| SIG | Special Integration Group
| Others |
| SIG | Special Interest Group
| Others |
| SIG | Special Interest Group of CIWM
| Others |
| SIG | Special Interest Groups
| Others |
| SIG | Special Investigation Groups
| Others |
| SIG | Spectrum Is Gopher
| Others |
| SIG | Spectrum Is Green
| Others |
| SIG | Speedometer Input Gear
| Others |
| SIG | Standardized Information Gathering
| Others |
| SIG | Stanford In Government
| Others |
| SIG | State Improvement Grants
| Others |
| SIG | State Incentive Grant
| Others |
| SIG | Sterk in grenzen
| Others |
| SIG | Store In Grease
| Others |
| SIG | Strata Information Group
| Others |
| SIG | Strategic Implementation Group
| Others |
| SIG | Street Index Gazetteer
| Others |
| SIG | Student Interest Group
| Others |
| SIG | Student Interest Groups
| Others |
| SIG | Summer Institute For Geeks
| Others |
| SIG | Summer Institute for the Gifted
| Others |
| SIG | Super Intelligent Geeks
| Others |
| SIG | Support and Information Group
| Others |
| SIG | Sure Isn't Glock
| Others |
| SIG | Sure Isnt Glock
| Others |
| SIG | Surface ImmunoGlobulin
| Others |
| SIG | Surgery Interest Group
| Others |
| SIG | Susquehanna International Group
| Others |
| SIG | Susquehanna International Group, L.L.P.
| Others |
| SIG | System Implementation Group
| Others |
| SIG | Systems Integration Group
| Others |
| sig | write on label
| Others |