- Simrad
- SimWatch
- SINGER
- SIT
- Sitecom
- Skil
- SKODA
- Sky-Watcher
- SkyLink
- Smart
- SMART Technologies
- Smartwares
- SMC
- Smeg
- Snakebyte
- Snooper
- Socomec
- SOG
- SOGELUX
- Solac
- Solé Diesel
- Solid State Logic
- Somfy
- Sonim
- Sony
- Sony Ericsson
- Sony Série
- Sophos
- SoundCraft
- Soyntec
- Specialized
- Spektrum
- SportDOG
- SPV
- SPYKER
- SsangYong
- Stabila
- stabo
- Stafor
- Stairmaster