There are a number of words used very frequently to describe properties of a confusion matrix (or contingency table).
Among them there is the word 'recall', this is to describe:
tp ――――― tp+tf
which means, the rate of your predicted positive instance out of the real true instance number (the true positives plus false negatives).
But this was given the name recall, which has confused me a lot.
After some digging within Cambridge Dictionary, I found that 'recall' sounds to me like you have your memory back and then you think of something you might have forgotten. Another is to describe how you want something you already sent out back.
So why can recall the word be used to describe the confusion matrix rate? When (and by who) was the first use of 'recall' in this way?