Registration
A registration, sometimes called a tail number, is an aircraft’s unique identifier. UK registrations start with G- followed by four letters; US registrations start with N followed by digits and letters; every country has its own scheme.
In Syndik8, the registration is a field on an aircraft. It appears on asset cards, on the calendar, on ICS feed entries, and anywhere the aircraft is named. Registrations in the documentation site are always G-DEMO, the fixed value used in the demo syndicate.