Today we’ve launched three new sites on Guardian Unlimited. Well, more correctly, we’ve redesigned and rebuilt our Science, Technology and Environment sites. Working for a media organisation, I can rely on people much more articulate than me to tell the stories better — see Alok Jha on Science, Alison Benjamin on Environment and (with more technical info than you can shake a memory stick at) Bobbie Johnson on Technology.

So I won’t repeat what they’ve said. Instead, I want to point to one tiny new feature which I’m unfeasibly excited about. It’s series. You know series. They’re those things which appear regularly in a paper or on a website.

In our redesigned sites we’ve introduced series as a specific and distinct concept. For example, Bad Science is a weekly series by Ben Goldacre on pseudo-science. Ask Jack is a series in which Jack Schofield helps people with their computer problems. In the old world these articles would be gathered into their own sections and left at that. But a series is a little bit more than this. For one thing when you land on an article in a series it’s nice to know that it is one of a family. We now flag that at the side of the piece. For another thing, you should be able to navigate to the next and previous articles in the series. Again, this series-specific navigation appears with each piece.

It’s a very small thing, but to me it shows something fundamental and important: the software we’re producing really does match the way our writers and editors think. It is, for those in the know, a result of domain driven design. For everyone else, it’s simply software that does what you think it should do.