I sometimes feel when I’m writing posts for Gizbuzz that I have to stop what I’m writing and explain it, just in case there are some readers who don’t fully understand what’s going on. I don’t really want to have to do this as it can sometimes get in the way, so over the coming weeks I’ll write some explainer posts of various concepts (eg AJAX) which hopefully will be interesting in themselves for some readers, and then then they can be linked to from any posts which are talking about related uses of these technologies. So if you already know what things like AJAX are (which I imagine most of you do) then just glaze over. Otherwise, happy reading!