Room : meeting or conference room. Please note that software is not suitable to manage other rooms, like offices, corridors, etc.
Location : physicall location of rooms. Room custom attributes and possible equipment are defined on location basis. Example: rooms at CERN may have different attributes and different equipment than rooms in Fermilab.
Booking : final reservation of a room. While considered final, it still may be rejected in case of emergency.
PRE-booking : not confirmed reservation of a room. PRE-booking is subject to acceptation or rejection.
Room responsible : the person who accepts / rejects bookings. Each room has exactly one person responsible. A person may be responsible for any number of rooms.
Room manager : room responsible