An online subscription will give you access to the current and all past issues of the magazine (well, all those that are online, which is very nearly all of them) but only while you are a subscriber. If you are going to cancel your subscription then please make sure beforehand that you have downloaded all articles that you are interested in. If you fail do so then that’s it…or in practice just email email@example.com and we’ll see what we can do (but there’s a limit…).
Also, please note that when viewed or downloaded all articles are watermarked with your details. This is a security measure because articles are for your private use only.