Sidecar

Sidecar is a term with several distinct meanings across different domains. It can refer to a vehicle attachment, a classic cocktail, a software design pattern, or a display feature in Apple's ecosystem.

In transportation, a sidecar is an auxiliary body mounted to the side of a motorcycle or bicycle to carry a passenger or cargo. It creates a three-wheeled vehicle and alters handling, stability, and braking. Sidecars may be fixed or detachable and can vary in seating and storage provisions.

The Sidecar is a cocktail traditionally made with cognac or brandy, orange liqueur, and lemon juice. It is shaken with ice and strained into a sugar-rimmed glass, often garnished with an orange twist. Origins are debated, with recipes dating to the early 20th century in Europe.

In software engineering, the sidecar pattern involves running an auxiliary process or container alongside a main application to provide supporting features such as logging, monitoring, or networking. The sidecar operates with the primary service, extending its capabilities without requiring changes to the main application's code.

Apple Sidecar is a feature introduced in 2019 that enables an iPad to function as a wireless or wired second display for a Mac. It supports touch input and, in compatible apps, Apple Pencil input, expanding the use of the iPad as a drawing surface or extended workspace.

Sidecar racing is a form of motorsport in which a driver and a passenger share a single motorcycle sidecar, competing on purpose-built tracks. The discipline emphasizes teamwork and balance, with the passenger shifting weight to influence cornering and stability.