Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Category: bird 
Words: flamingo, crane, neck, ostrich, davit
davit

Category: direction 
Words: down, lower, emotional upsets, below, falling
emotional upsets

Category: computers 
Words: firewall, file, ram, schedule, folder

schedule