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: body part 
Words: heel, shin, pound, finger, foot
pound

Category: computers 
Words: hardware, sort mail, download, program, file
sort mail

Category: store status 
Words: right there, close, shut down, out of service, steady

right there