| SID | Isidore 
| Others |
| SID | PlaySID tunes and sound effects file
| Others |
| SID | Saab Information Display
| Others |
| SID | Sadistic Intelligent Dangerous
| Others |
| SID | Safer Internet Day
| Others |
| SID | Safety Identity and Difference
| Others |
| SID | Safety in Design
| Others |
| SID | Sal, Cape Verde Islands
| Others |
| SID | Sales Terminal Identifier
| Others |
| SID | Sanitary Improvement District
| Others |
| SID | Satan In Discuise
| Others |
| SID | Satan In Disguise
| Others |
| SID | Schedule IDentifier number
| Others |
| SID | Scheme Information Document
| Business, Finance, Fund, Investment |
| SID | School Infrastructure Database
| Others |
| SID | School of Interior Design
| Others |
| SID | Scientific Investigation Division
| Others |
| SID | Scouting Internet Directory
| Others |
| SID | Seamless Image Database
| Others |
| SID | Searchable Image Database
| Others |
| SID | Secondary Imagery Dissemination
| Others |
| SID | Security Id
| Others |
| SID | Security Identifier
| Others |
| SID | Security Identifier Dietmonday
| Others |
| SID | Security In Depth
| Others |
| SID | See it Differently
| Others |
| SID | Selected Item Drawing
| Others |
| SID | Selfies Instants And Doubles
| Others |
| SID | Semel in Die
| Others |
| SID | Sender Id
| Others |
| SID | Seniority Integration Date
| Others |
| SID | Sensory Integration Disorder
| Others |
| SID | Sensory Integration Dysfunction
| Others |
| SID | Sensory Intensive Development
| Others |
| SID | Sequence Id
| Others |
| SID | Serial Input Data
| Others |
| SID | Serious In Design
| Others |
| SID | Sermon and Illustration Database
| Others |
| SID | Service Id
| Others |
| SID | Service Interval Display
| Others |
| SID | Session Id
| Others |
| SID | Severe Intellectual Disability
| Others |
| SID | Sex In Doubt
| Others |
| SID | Shallow, Intermediate, and Deep
| Others |
| SID | Share Internet Data
| Others |
| SID | Shared Information and Data
| Others |
| SID | Shared Information Distance
| Others |
| SID | Ship In Distress
| Others |
| SID | Shuttle Integration Device
| Others |
| SID | Sidamo
| Others |
| SID | Side Impact Dummy
| Others |
| SID | Sidney
| Others |
| SID | Signaling Identifier
| Others |
| SID | Significant Industrial Discharge
| Others |
| SID | Silence Is Dead
| Others |
| SID | Silver Dawn
| Others |
| SID | Simple Information Database
| Others |
| SID | Simply Intelligent Designs
| Others |
| SID | Simulator Interface Devices
| Others |
| SID | Sleep Is Death
| Others |
| SID | Slew Induced Distortion
| Others |
| SID | Smad Interaction Domain
| Others |
| SID | Smart Information Display
| Others |
| SID | Society for Information Display
| Others |
| SID | Society for Information Display's
| Others |
| SID | Society For Information Displays
| Others |
| SID | Society for International Development
| Others |
| SID | Society for Investigative Dermatology
| Others |
| SID | Software Item Description
| Others |
| SID | Solid Ink Density
| Others |
| SID | Solidarity Independence Democracy
| Others |
| SID | Someones In Denial
| Others |
| SID | Sonic Interaction Design
| Others |
| SID | Sound Interface Device
| Others |
| SID | Sound Interference Device
| Others |
| SID | Source Identification
| Others |
| SID | Source Image Distance
| Others |
| SID | Source Input Document
| Others |
| SID | Source To Image Distance
| Others |
| SID | South Indian Dance
| Others |
| SID | Space Intruder Detector
| Others |
| SID | Spacecraft Identification Number
| Others |
| SID | Special Improvement District
| Others |
| SID | Special Investigation Division
| Others |
| SID | Speed Indicating Device
| Others |
| SID | Speed Indication Device
| Others |
| SID | Speed Indicator Device
| Others |
| SID | Speed Indicator Display
| Others |
| SID | Spin Inverted Determinant
| Others |
| SID | Sports Illustrated Dog
| Others |
| SID | Sports Information Director
| Others |
| SID | Standard Instrument Departure
| Others |
| SID | Standard Interface Document
| Others |
| SID | Stars In Downe
| Others |
| SID | State Identification Number
| Others |
| SID | State Inpatient Databases
| Others |
| SID | Static Impeller Driven
| Others |
| SID | Still In Development
| Others |
| SID | Stitch In the Ditch
| Others |
| SID | Strategic Information Development
| Others |
| SID | Strong Ion Difference
| Others |
| SID | Structural Intervention Distance
| Others |
| SID | Subspace Identification
| Others |
| SID | Subsystem Identification
| Others |
| SID | Subsystem Identifier
| Others |
| SID | Subunit Interaction Domain
| Others |
| SID | Sudden Internal Death
| Others |
| SID | Sudden Ionosphere Disturbance
| Others |
| SID | Super Intelligent Design
| Others |
| SID | Superlight Integrated Design
| Others |
| SID | Supplemental Installation Disk
| Others |
| SID | Support For Instructional Designers
| Others |
| SID | Sustainable International Development
| Others |
| SID | Swift Interface Device
| Others |
| SID | Sydney International Dragway
| Others |
| SID | System Id
| Others |
| SID | System Identification Number
| Others |
| SID | System IDentifier
| Others |
| SID | System Information Display
| Others |
| SID | System Installation Diskette
| Others |
| SID | System Interface Document
| Others |
| SID | The Scottish Intelligence Database
| Others |