Terminal ABBR is a term used in the airline industry to refer to abbreviations used to describe the various stages of a flight. POS stands for Point of Sale, which is the location where a ticket is purchased. DEP stands for Departure, which is the time and date when the flight leaves. ARR stands for Arrival, which is the time and date when the flight arrives. ETA stands for Estimated Time of Arrival, which is the estimated time that the flight will arrive at its destination. ETD stands for Estimated Time of Departure, which is the estimated time that the flight will leave its origin. STA stands for Scheduled Time of Arrival, which is the scheduled time that the flight will arrive at its destination.