snap - spen
- snap-shot trend block
- snapshot waveform
- SNIP
- SO
- soaked coating
- sodium hypochlorite dosing pump
- sodium hypochlorite tank
- SOE
- software
- software and hardware complex
- software and hardware facilities
- software I/O
- solderer
- soldering
- solenoid valve
- solid wastes polygon
- soot
- SOP
- sour flare pump
- sour gas
- sour gas flare
- sour gas flare knockout drum
- sour water
- sour water rundown pump
- sour water stripper
- sour water stripping
- sour water surge drum
- sour waters stripping units
- south east
- south west
- SOV
- SP
- SPA
- spandrel
- specific gravity
- specific heat
- specified extended event
- specified record
- spectacle blind
