| ser | Webalizer Language Data |
| server | Bonobo Activation API Data |
| server | MySQL Server Script |
| serverdef | Eclipse WTP Server Definition Data |
| ses | Adobe Audition v2 Session |
| ses | DynaComm Terminal Session Data |
| ses | Hummingbird Exceed X-Session Data |
| ses | MSC Patran Session Data |
| ses | Safend Protector Encrypted Volume |
| ses | SciTE Session Data |
| ses | Shadow Security Scanner Session Data |
| ses | SPECCTRA Session File |
| ses | Zemax Session Data |
| sess | PHP Session Data |
| session | Mozilla Firefox Session Data |
| sestyles | Spatial Workshop Geospatial Style Library |
| sesx | Adobe Audition Session |
| set | 3WayPack Set Data |
| set | AutoCAD LT Set Data |
| set | BPM Studio Encrypted User Information |
| set | Corel Painter Settings Data |
| set | Mastercam Setup Sheet Template |
| set | Nikon Capture Settings Data |
| set | PLINK END-terminated Variant Set Membership List |
| set | Raynen-Qili KnitCAD Pattern Expansion Data |
| set | Sibelius Sound Set Definition |
| set | Xerox Document Library Property Set |
| settingcontent-ms | Microsoft Windows 10 Settings Data |
| setup | TD Setup Data |
| sev | Sevilla Tournament Data |
| sevz | Sevilla Compressed Tournament Data |
| sew | Carlson 2016 Sewer Network Data |
| sew | Janome Stitch-based Embroidery Data |
| sez | SEEP/W ZIP Compressed Data |
| sf | Cognos Powerhouse Subfile Data |
