It is frustrating. For some companies I believe it is because you might be the second or third choice, so they keep your application around just in case the fir

It is frustrating. For some companies I believe it is because you might be the second or third choice, so they keep your application around just in case the first choice doesn't accept the offer. Obviously this is less likely the case after a few months! That said, I have heard back from applications months later quite a few times asking for an interview! I have no idea what took them so long!