It seems like the United Club agents in Denver really like to complain about the "terrible 1970's computer system that won't let us do anything" when dealing with passengers. Frankly, it makes then seem like angry, bitter, lazy complainers who didn't bother to learn what they needed to learn to do their jobs. I should note that these complaints were unsolicited and came with an eye-roll in response to a simple request (seat change, same-day-change, etc.) This thread shouldn't become a debate on which computer system is superior. The agents have had well over a year to learn it, it's essential to their jobs, and complaining about it (especially to passengers) is extremely unprofessional.