Q-SWITCHING in lasers

QUADRANTS for surveying or navigating

QUADS for composing type

QUALITY-CONTROL systems

QUASI-OPTICAL devices for electromagnetic waves

arrangements of QUASI-OPTICAL for electromagnetic waves in waveguides

QUENCHING of energy in lasers or masers

QUENCHING of metals see HEAT TREATMENT

QUESTION -and-answer games

machines for sewing QUILT(S)

QUILTING of upholstery

QUINACRIDONE dyes

QUINOLINE or hydrogenated QUINOLINE or derivatives thereof

QUINONE IMIDE dyes

binding QUIRES

QUOINS for composing type