CmdrTaco from the wasn't-that-ship-date dept.
An anonymous reader writes "Gartner is saying it's time to plan your migration now (if you havent already done it). I for one know my company still has loads of users still on XP, citing training costs (time and money) rather than software license fees. Is my company alone in wanting to stay in the 1990s or is Windows 7 the way forward?"
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"