jam to signal ratio (J/S ratio)

reduction ratio / gear ratio

Voltage Standing Wave Ratio (VSWR) / voltage standing-wave ratio

signal-to-noise ratio (SNR; S/N)

signal-to-interference-plus-noise ratio (SINR)

Signal Kit / MK-79 (illumination signal kit)

jam emissions (v)

Joint Concept for Access and Maneuver in the Global Commons (JAM-GC)

anti-jam antenna retrofit

jam the comm

jam-resistant communication

jam the accelerator down

jam a leave

jam a road

jam jar

jam pot

jam-free

jam

jam cleat

feed jam

home-on-jam (HOJ) missile

aspect ratio

fighter-to-administrative personnel ratio

high expansion-ratio

mass ratio

power-to-weight ratio

thrust-to-weight ratio

damping ratio

attenuation ratio

base pressure ratio

weight-horsepower ratio

weight-strength ratio

depression ratio