- Soft lithography
- Soft matter
- Soft palate
- Soft robots
- Soft sensor
- Soft set
- Soft state
- Soft tissue
- Soft tissue sarcoma
- Soft-decision decoding
- Soft-tissue sarcoma
- SoftAP
- Softening point
- Softgel
- Softmax
- Softmax function
- Softphones
- Software
- Software agents
- Software aging
- Software architects
- Software architecture
- Software architecture analysis method
- Software architecture recovery
- Software bugs
- Software components
- Software crisis
- Software deployment
- Software design
- Software development
- Software development process
- Software diversity
- Software ecosystem
- Software engineering
- Software engineering body of knowledge
- Software evolution
- Software feature
- Software framework
- Software maintenance
- Software measurement
- Software metrics
- Software pipelining
- Software piracy
- Software product line
- Software quality
- Software quality assurance
- Software requirements
- Software system
- Software testing
- Software verification and validation
- Software visualization
- Software-defined data center
- Software-defined storage
- Soil
- Soil acidification
- Soil aggregate stability
- Soil biodiversity
- Soil biology
- Soil borne pathogens
- Soil carbon
- Soil cement
- Soil color
- Soil compaction
- Soil conditioners
- Soil conservation
- Soil consolidation
- Soil contamination
- Soil creep
- Soil crust
- Soil degradation
- Soil ecology
- Soil enzyme
- Soil erosion
- Soil fertility
- Soil functions
- Soil gas
- Soil gradation
- Soil guideline value
- Soil guideline values
- Soil health
- Soil liquefaction
- Soil management
- Soil matrix
- Soil mechanics
- Soil mesofauna
- Soil microbiology
- Soil moisture
- Soil moisture sensors
- Soil nailing
- Soil nutrients
- Soil organic matter
- Soil pH
- Soil physics
- Soil quality
- Soil regeneration
- Soil resilience
- Soil resistivity
- Soil respiration
- Soil salinity
- Soil science
- Soil sealing
- Soil seed bank
- Soil stabilization
- Soil stabilizer
- Soil structure
- Soil structure interaction
- Soil test
- Soil thermal properties
- Soil vapor extraction
- Soil water
- Soil-structure interaction
- Soil-transmitted helminth
- Soiling
- Sol-air temperature
- Sol-gel
- Sol-gel process
- Solana
- Solar
- Solar Decathlon
- Solar access
- Solar air conditioning
- Solar architecture
- Solar azimuth angle
- Solar cars
- Solar cell efficiency
- Solar cells
- Solar chemical
- Solar chimney
- Solar constant
- Solar cookers
- Solar cycle
- Solar day
- Solar desalination
- Solar dryer
- Solar energy
- Solar energy forecasting
- Solar fuel
- Solar furnace
- Solar gain
- Solar heating
- Solar inverter
- Solar luminosity
- Solar mass
- Solar neutrinos
- Solar panels
- Solar ponds
- Solar power
- Solar power forecasting
- Solar power towers
- Solar radiation management