The Italian feature film Cabiria (1914), directed by Giovanni Pastrone, was the first popular film to use dolly shots, which in fact were originally called "Cabiria movements" by contemporary filmmakers influenced by the film; however, some smaller American and English films prior to 1914 had used the technique prior to Cabiria.
The tracking shot can include smooth movements forward, backward, along the side of the subject, or on a curve. Dollies with hydraulic arms can also smoothly "boom" or "jib" the camera several feet on a vertical axis. Tracking shots, however, cannot include complex pivoting movements, aerial shots or crane shots.
Tracking shots are often confused with the long take -- such as the 10-minute takes in Alfred Hitchcock's Rope (1948) -- or sequence shots.