An overview of recent developments in air jet weft insertion technology addresses weft storage systems. main nozzles, reeds, relay nozzles, loom setting, air supply and energy consumption, water jet weaving, air flow, fluid dynamics, flow in the guide channel and main nozzle, air drag theory, the influence of filling yarn properties on the speed of spun and continuous filament yarn manufacture, pricing, setting optimization, loom control, filling yarn stops, warp related weft stops without a yarn break, filling yarn breaks, air jet weaving applications, air flow supporting insertion by the internal principle, air jet systems on projectile looms, twin fabric weaving, the pneumatic rapier picking system, two sided fabric construction, and warpwave air jet looms. 167 refs.