Fly-by-wire is a technology used in modern aircraft where electronic systems control the flight controls instead of traditional mechanical linkages. This means that when a pilot moves the control stick or yoke, electronic signals are sent to the aircraft's control surfaces, allowing for more precise and responsive handling. This system enhances safety and efficiency by incorporating computer algorithms that can assist pilots in managing the aircraft's performance. Additionally, fly-by-wire systems can reduce weight and maintenance costs, as they eliminate the need for heavy mechanical components and cables typically found in older aircraft designs.