These use the tags dd, dl and dt - I'd never come across them before, but they are in my HTML pocket guide from 2002, so they're nothing new.
When viewed in Firefox 3 with no CSS, the above looks something like this:
Foobar Not a good state to be in Windows A pile of crap Apple Overrated
A CSS file I found for them turned it into 3 lines with the first item emboldened.
Confusingly there is also a <dfn> element which isn't related to definition lists, which seems to be intended to be used the first time a term is used. (Similar to how the first reference to something is a link in Wikipedia, but not subsequent mentions?)