What is the meaning of no slots available in DC++?

De très nombreux exemples de phrases traduites contenant slots available – Dictionnaire français-anglais et moteur de recherche de traductions françaises

​Immigration Medical Examination appointments are made available daily on the Bupa Migration Visa Services website​ Due to high visa demand,

available slot Once a slot is taken it is no longer available, but 'All slots are taken' sounds fine to me D

mega fortune slot review Slot Booking Slot booking for Citizens · MV Revision Additional PPB No, Survey No, Transacted Extent available, Consideration value, Boundary