stra - surf
- straight angle
- straight pair
- straight receiver
- straight-line interpolation
- straight-moving potentiometer
- stranded wire
- stratified ionosphere
- stratified troposphere
- stratosphere
- stratosphere propagation
- stray
- stray capacitance
- stray delay
- stray feedback
- stray parameter
- stray radiation
- stream
- stream cipher
- stream encryption
- strength
- strength design
- strength of soldering
- strength test
- strengthen cooperation
- stretcher
- string
- strip conductor
- strip line
- strip the wire
- strip width
- strip-chart
- stripe laser
- stripline
- stripline antenna
- stripline antenna array
- stripline circulator
- stripline duplexer
- stripline filter
- stripline isolator
- stripline package
