Mandriva One is a kind of stripped down operating system for users new to Linux.
It has basic programs included--like Office Writer (which easily interprets Word for Windows files)--Linux web browsers, firewalls, calculators, email clients and so on. But for the fancy stuff, users need a more comprehensive system such as Mandriva 2007, or the Mandriva 2007 Power Pack. The Spring 2007 version of Mandriva 2007 includes KDE 4.0.
After trying Mandriva One on a new machine several months ago, I can only say, I don't recommend it. It's too basic, and not worth it, now that Mandriva has worked out some of the bugs from its newest 2007 generation.
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