If you look underneath the text field when you reply to any post (not using "quick reply", obviously) you'll see another field called "Tags". Whatever you type in there can then be used to find posts on a similar theme easily.
That's what makes up the "Popular Tags" box on the "Programs" page of the forum section.
You probably accidentally landed in the Tags field and typed the letter "i" - hence your 'post filed under "i" ' puzzlement.
It's a useful feature, somewhat under-used here (which is a pity, as without a real cross-programme board or forum-technical board, some themes are duplicated in multiple fora).
For an example ofa tag that is linked to multiple posts, click on something like "attack killed my trainers" in the "popular tags" box - I tagged all the posts of mine to threads that are basically the same with the same tag as I replied to them - so I know there are a few things filed under that!
The same tag can point to multiple threads - again in the Combat "Popular Tags" box, clicking on "Music" will take you to a number of different threads on the same topic. Different people's posts in the same thread could be tagged differently, so the forum software only displays the opening of tagged posts, then the individual post when you click on it - you need to click the "view complete thread" button to see the whole thread.
For an example of using tags established by someone else, look in the Combat forum's "Popular Tags" box for "10hr Combat". That was used as a tag by the opening poster on the thread, and when I posted on it a long time later I used the same tag to reflect that a long-dormant thread was being proddded into (short-lived, as it turns out) wakefulness.
If everyone on a thread did this, the "Popular Tags" box would reflect what topics are being discussed, and there would be a web of links to follow from posts on each thread from posts with more than one tag on them, or using tags that (like the "Music" example above) point to several different posts on different threads on the different LMI forums here.
A thread can also have multiple tags - so you could file something under both "attack killed my trainers" and "10hr Combat" if you were (for example) bemoaning the fact that your shoes stood up to 10 hours of BodyCombat on the trot, but snuffed it after one Attack class or something.
I've tagged this post as "Using Tags", so you can see how it looks.
I've been invisible for a while - profile got deleted, so I'm back and 'friendless' with a post-count of about zero - so hello again everyone.
