| spx | Mac OS X System Profiler XML Report |
| sq3 | oml2-server Database |
| sq3 | SQLite 3 Database |
| sq7 | Daktronics Venus 7000 Sequence Data |
| sqb | SQL Backup SQL Server Backup |
| sqd | DNASTAR SeqMan Document |
| sqd | FidoNet Squish Data |
| sqd | Sysquake SQ Data |
| sqdb | SpellQuizzer Database |
| sqexp | SpellQuizzer Exported Data |
| sqg | SeQuence Graph Data |
| sqi | FidoNet Squish Index Data |
| sql | FidoNet Squish Lastread Storage |
| sql | SQL Script |
| sqlite | SQLite Database |
| sqlite | WhatsApp Messenger for iPhone Database |
| sqlite-shm | SQLite Shared Memory Data |
| sqlite-wal | SQLite Quasi-persistent Data |
| sqlite2 | SQLite 2.0 Database |
| sqlite3 | SQLite 3 Database |
| sqlitedb | SQLite Database |
| sqlitedb-shm | SQLite Shared Memory Data |
| sqlitedb-wal | SQLite Quasi-persistent Data |
| sqlplan | Microsoft SQL Server Database Plan |
| sqlt | SQLite Database |
| sqlx | JAX-DB SQLx Data |
| sqm | Microsoft Message Queuing Data |
| sqm | Microsoft Service Quality Monitoring Data |
| sqp | Sonique Audio Search Query Result Data |
| sqs | SQL Script Sequences |
| squ | LabWindows Test Sequence |
| sqv | VisionWorks LS Image Sequence Data |
| sqw | Horace Data |
| sqy | Xaira Saved Query |
| sr1 | SIR Schema Rectype and Variable Specs Data |
