In target archery we shoot "Rounds" these are predefined sessions shooting a specific number of arrows at a specific distance and target face.
Indoor rounds are shot at one distance, and outdoor rounds are shot at multiple distances starting with the longest distance then moving on to shorter distances.
In the UK target archers shoot two different types of rounds;
Imperial Rounds (Archery GB) are shot at distances measured in yards, and use 5 zone scoring (described above) for outdoors and generally 10 zone scoring for indoors.
Indoor rounds are shot in ends of 3 arrows (with the exception of a Worcester which is shot in 5 arrow ends) and outdoor rounds are shot in ends of 6 arrows.
World Archery Rounds (formerly FITA) are shot at distances measured in meters and scored using 10 zone scoring (indoors and outdoors). For further details please see the Archery GB rules of Shooting