- Soaring
- Sobel operator
- Sobel test
- Sobolev spaces
- Sociable
- Social choice theory
- Social commerce
- Social complexity
- Social cost of carbon
- Social design
- Social desirability bias
- Social distancing
- Social history
- Social impact assessment
- Social informatics
- Social media
- Social media in education
- Social media mining
- Social metabolism
- Social model of disability
- Social network analysis
- Social network analysis software
- Social networks
- Social progress index
- Social robots
- Social semantic web
- Social simulation
- Social-desirability bias
- Society of Manufacturing Engineers
- Socio-hydrology
- Sociotechnical systems
- Socket
- Sockpuppets
- Socratic method
- Sod
- Sod1
- Soda lime
- Soda-lime glass
- Sodalite
- Sodium
- Sodium acetate
- Sodium acid pyrophosphate
- Sodium adsorption ratio
- Sodium aluminosilicate
- Sodium amide
- Sodium ascorbate
- Sodium aurothiomalate
- Sodium azide
- Sodium benzoate
- Sodium bicarbonate
- Sodium bifluoride
- Sodium bismuth titanate
- Sodium bismuthate
- Sodium bisulfite
- Sodium borate
- Sodium borohydride
- Sodium butyrate
- Sodium carbonate
- Sodium channel blockers
- Sodium channels
- Sodium chlorate
- Sodium chloride
- Sodium chloroacetate
- Sodium chromate
- Sodium citrate
- Sodium cobaltinitrite
- Sodium diacetate
- Sodium dichloroisocyanurate
- Sodium dichromate
- Sodium dithionite
- Sodium diuranate
- Sodium dodecylbenzenesulfonate
- Sodium erythorbate
- Sodium ethoxide
- Sodium ferrocyanide
- Sodium fluoroacetate
- Sodium formate
- Sodium gluconate
- Sodium hexametaphosphate
- Sodium hyaluronate
- Sodium hydrosulfide
- Sodium hydroxide
- Sodium hypochlorite
- Sodium hypophosphite
- Sodium lactate
- Sodium laurate
- Sodium laureth sulfate
- Sodium lauryl sulfate
- Sodium metabisulfite
- Sodium metaborate
- Sodium metasilicate
- Sodium metavanadate
- Sodium methoxide
- Sodium molybdate
- Sodium monofluorophosphate
- Sodium nitrate
- Sodium nitrite
- Sodium oxalate
- Sodium oxide
- Sodium pentaborate
- Sodium perborate
- Sodium percarbonate
- Sodium perchlorate
- Sodium periodate
- Sodium permanganate
- Sodium peroxide
- Sodium persulfate
- Sodium pertechnetate
- Sodium phenolate
- Sodium phenylbutyrate
- Sodium phosphate
- Sodium polyacrylate
- Sodium polysulfide
- Sodium propionate
- Sodium pyruvate
- Sodium salicylate
- Sodium salt
- Sodium salts
- Sodium selenate
- Sodium selenite
- Sodium silicate
- Sodium stearate
- Sodium sulfate
- Sodium sulfide
- Sodium sulfite
- Sodium tetrafluoroborate
- Sodium tetraphenylborate
- Sodium thiocyanate
- Sodium thiosulfate
- Sodium trimetaphosphate
- Sodium triphosphate
- Sodium tripolyphosphate
- Sodium tungstate
- Sodium zincate
- Sodium-24
- Sodium-calcium exchanger
- Sodium-cooled fast reactor
- Sodium-iodide symporter
- Sodium-ion batteries
- Sodium-ion battery
- Sodium-potassium alloy
- Sodium-potassium pump
- Sofar channel
- Sofosbuvir
- Soft biometrics
- Soft chemistry
- Soft computing
- Soft error
- Soft handover
- Soft infrastructure