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: emotional status 
Words: board, bored, emotional supports, frustrated, fret
board

Category: computers 
Words: ram, file, prepare, keys, format
prepare

Category: emotional status 
Words: high quality, fine, annoyed, relaxed, ok

high quality