SpellsCharm
Accio
Accio is the Summoning Charm. It calls an object to the caster, even from a distance, if the caster concentrates on it. Harry learns it for the first task so he can call his broom into the dragon enclosure. Hermione later uses it for books, and the trio rely on it while hunting Horcruxes.
In the books
Harry Potter and the Goblet of FireChapter: The First Task
Harry summons his Firebolt during the first task, after practicing the charm for that task. This page treats the task as a clear use and does not pin an earlier practice line.