Denver International Airport, one of the most modern airports in the USA, finally opened in 1995. It was delayed for most of a year and was the epitome of construction debacles when the automated baggage system that United Airlines had specified could not be debugged. The system was eventually abandoned in favor of the traditional “tug and cart” method of getting baggage to and from the airplanes.
Bar code readers now keep track of luggage and link each bag to the customer, their location and all their personal and travel info. This information is instantly available throughout the airline including the dispatchers who are responsible for loading the aircraft.